www-client/chromium: dev channel bump to 104.0.5083.0

Bump chromium's dev channel to 104.0.5083.0.

This adds support compiling Chromium with Profile Guided Optimizations
via the pgo USE flag. This does not use the official PGO profile bundled
in the sources, instead it creates it's own profile during compilation,
the same way as www-client/firefox does (via virtualx).

Note that compilation time increases significantly, since we are
compiling two times and profiling inbetween.

Signed-off-by: Marek Behún <kabel@kernel.org>
Closes: https://github.com/gentoo/gentoo/pull/25671
Signed-off-by: Stephan Hartmann <sultan@gentoo.org>

3 files changed, 1181 insertions, 0 deletions

diff --git a/www-client/chromium/Manifest b/www-client/chromium/Manifest
index aa7621cdd4cb..18607f76e272 100644
--- a/www-client/chromium/Manifest
+++ b/www-client/chromium/Manifest
@@ -4,3 +4,6 @@ DIST chromium-102-patchset-6.tar.xz 4780 BLAKE2B c59d23779fd769176e1cd92884dd259
 DIST chromium-102.0.5005.61.tar.xz 1433350708 BLAKE2B 7130b2c9dbc67783499003fd98f95e050bac3580e9dd6c9f4fee320e9eed876cd8c3ec29d9e9f23c78c159b1b622fbe0511750baeb6f8117f176612e1571747f SHA512 4b5d48debafef0a38105e259f97eac6e25eae1147ce67e357c3ce1e8e7700950af63117ff104b71cfbdfcaa0b31925d1b686ab1be6c52b32dad819c7e38f1846
 DIST chromium-103-patchset-4.tar.xz 7220 BLAKE2B 3dc9670be01d4bbfd24e8d305ea72e6bd911062a9a012c7548fca76ec34998b54ff31ef0118be5db9fdde3839365103cb06b29ff2ab167ad4313b4b64cba3a63 SHA512 54fb3600bb42ffcd6168f9741432879877bb5d206c11b3874249faaaff13288bffd4e7336f055c0c619efba02aa694de6abde394a6964c0ff6b33d9e3aed1691
 DIST chromium-103.0.5060.24.tar.xz 1442066428 BLAKE2B dc2cb67bf8aec50f22ae14ca36ffde555c076f197895e9da759e4292b83b15e24ddf5888af409afde273699fa1e15f3ca95f0663b7c8dbef9db74f44d361c671 SHA512 23c34f634ca890467de44efc25caa0e55d2668643ace19e6759a45b3c6119a98ddd885cab6b1a9a665613958abcc28c3b5439f36ce6c1bcb47547c56047e4c7c
+DIST chromium-104-patchset-1.tar.xz 5792 BLAKE2B 7febe80c63c598812c86196fb0279132dfb3fec827841e51aafdc8e24e3eb04834578d351b049275688d1b0ae7e17fcbf47b5ec4905b943cbb7570f4d4c1ec3f SHA512 ff87c1150c74a97f4d08da2af4266861503df45061b57283a098225078a118e240c3ef7ad0e943d6bb56d3b73a4d839109b1344dec833d4acd0ed5f07230dff5
+DIST chromium-104.0.5083.0.tar.xz 1443051464 BLAKE2B 9746f6a0fb058e12507565c59b2e582efb9188bf6faeaaf17c45a1b52269b780a54f507bc6377c6790e7f37ddb8333e193ab5190352d3eb74c39cd80756ea4c3 SHA512 d8a88805710934fed80ce00a144f1e7517149a6ee495df5a2f9fa4095de6125a59d261041c72f45bd1087060899cc1afc437f32373a74ba7bb3a8c378b9d7503
+DIST chromium-profiler-0.1.tar 269066240 BLAKE2B 6897387b63ff9a724b67f2e8799fe803dc75da376da809e752d19d6f5cf98bd84ac24161d07ac4a967577279e9ad5a8a46f0825332a7ee933a27693d6dc95611 SHA512 3fb6132599d28455d1b5c04d856ea7623e49b0b0b96f021c31d0952c4ba57d69d0a1cae6f0b91470a235221c89cc0d3bb38303ff02594ed0739712e6e2f8dbcc
diff --git a/www-client/chromium/chromium-104.0.5083.0.ebuild b/www-client/chromium/chromium-104.0.5083.0.ebuild
new file mode 100644
index 000000000000..f4c991f52087
--- /dev/null
+++ b/www-client/chromium/chromium-104.0.5083.0.ebuild
@@ -0,0 +1,1177 @@
+# Copyright 2009-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+PYTHON_COMPAT=( python3_{8..10} )
+PYTHON_REQ_USE="xml"
+LLVM_MAX_SLOT=14
+
+CHROMIUM_LANGS="af am ar bg bn ca cs da de el en-GB es es-419 et fa fi fil fr gu he
+	hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr
+	sv sw ta te th tr uk ur vi zh-CN zh-TW"
+
+VIRTUALX_REQUIRED="pgo"
+
+inherit check-reqs chromium-2 desktop flag-o-matic llvm ninja-utils pax-utils python-any-r1 readme.gentoo-r1 toolchain-funcs virtualx xdg-utils
+
+DESCRIPTION="Open-source version of Google Chrome web browser"
+HOMEPAGE="https://chromium.org/"
+PATCHSET="1"
+PATCHSET_NAME="chromium-$(ver_cut 1)-patchset-${PATCHSET}"
+SRC_URI="https://commondatastorage.googleapis.com/chromium-browser-official/${P}.tar.xz
+	https://github.com/stha09/chromium-patches/releases/download/${PATCHSET_NAME}/${PATCHSET_NAME}.tar.xz
+	pgo? ( https://blackhole.sk/~kabel/src/chromium-profiler-0.1.tar )"
+
+LICENSE="BSD"
+SLOT="0/dev"
+KEYWORDS="~amd64 ~arm64"
+IUSE="+X component-build cups cpu_flags_arm_neon debug gtk4 +hangouts headless +js-type-check kerberos libcxx lto +official pgo pic +proprietary-codecs pulseaudio screencast selinux +suid +system-ffmpeg +system-harfbuzz +system-icu +system-png vaapi wayland widevine"
+REQUIRED_USE="
+	component-build? ( !suid !libcxx )
+	screencast? ( wayland )
+	!headless ( || ( X wayland ) )
+	pgo ( X !wayland )
+"
+
+COMMON_X_DEPEND="
+	x11-libs/libXcomposite:=
+	x11-libs/libXcursor:=
+	x11-libs/libXdamage:=
+	x11-libs/libXfixes:=
+	>=x11-libs/libXi-1.6.0:=
+	x11-libs/libXrandr:=
+	x11-libs/libXrender:=
+	x11-libs/libXtst:=
+	x11-libs/libxshmfence:=
+"
+
+COMMON_SNAPSHOT_DEPEND="
+	system-icu? ( >=dev-libs/icu-71.1:= )
+	>=dev-libs/libxml2-2.9.4-r3:=[icu]
+	dev-libs/nspr:=
+	>=dev-libs/nss-3.26:=
+	!libcxx? ( >=dev-libs/re2-0.2019.08.01:= )
+	dev-libs/libxslt:=
+	media-libs/fontconfig:=
+	>=media-libs/freetype-2.11.0-r1:=
+	system-harfbuzz? ( >=media-libs/harfbuzz-3:0=[icu(-)] )
+	media-libs/libjpeg-turbo:=
+	system-png? ( media-libs/libpng:=[-apng] )
+	>=media-libs/libwebp-0.4.0:=
+	media-libs/mesa:=[gbm(+)]
+	>=media-libs/openh264-1.6.0:=
+	sys-libs/zlib:=
+	x11-libs/libdrm:=
+	!headless? (
+		dev-libs/glib:2
+		>=media-libs/alsa-lib-1.0.19:=
+		pulseaudio? ( media-sound/pulseaudio:= )
+		sys-apps/pciutils:=
+		kerberos? ( virtual/krb5 )
+		vaapi? ( >=x11-libs/libva-2.7:=[X?,wayland?] )
+		X? (
+			x11-libs/libX11:=
+			x11-libs/libXext:=
+			x11-libs/libxcb:=
+		)
+		x11-libs/libxkbcommon:=
+		wayland? (
+			dev-libs/wayland:=
+			screencast? ( media-video/pipewire:= )
+		)
+	)
+"
+
+COMMON_DEPEND="
+	${COMMON_SNAPSHOT_DEPEND}
+	app-arch/bzip2:=
+	dev-libs/expat:=
+	system-ffmpeg? (
+		>=media-video/ffmpeg-4.3:=
+		|| (
+			media-video/ffmpeg[-samba]
+			>=net-fs/samba-4.5.10-r1[-debug(-)]
+		)
+		>=media-libs/opus-1.3.1:=
+	)
+	net-misc/curl[ssl]
+	sys-apps/dbus:=
+	media-libs/flac:=
+	sys-libs/zlib:=[minizip]
+	!headless? (
+		X? ( ${COMMON_X_DEPEND} )
+		>=app-accessibility/at-spi2-atk-2.26:2
+		>=app-accessibility/at-spi2-core-2.26:2
+		>=dev-libs/atk-2.26
+		media-libs/mesa:=[X?,wayland?]
+		cups? ( >=net-print/cups-1.3.11:= )
+		virtual/udev
+		x11-libs/cairo:=
+		x11-libs/gdk-pixbuf:2
+		x11-libs/pango:=
+	)
+"
+RDEPEND="${COMMON_DEPEND}
+	!headless? (
+		|| (
+			x11-libs/gtk+:3[X?,wayland?]
+			gui-libs/gtk:4[X?,wayland?]
+		)
+		x11-misc/xdg-utils
+	)
+	virtual/ttf-fonts
+	selinux? ( sec-policy/selinux-chromium )
+"
+DEPEND="${COMMON_DEPEND}
+	!headless? (
+		gtk4? ( gui-libs/gtk:4[X?,wayland?] )
+		!gtk4? ( x11-libs/gtk+:3[X?,wayland?] )
+	)
+"
+
+depend_clang_llvm_version() {
+	echo "sys-devel/clang:$1"
+	echo "sys-devel/llvm:$1"
+	echo "=sys-devel/lld-$1*"
+}
+
+depend_clang_llvm_versions() {
+	local _v
+	if [[ $# -gt 1 ]]; then
+		echo "|| ("
+		for _v in "$@"; do
+			echo "("
+			depend_clang_llvm_version "${_v}"
+			echo ")"
+		done
+		echo ")"
+	elif [[ $# -eq 1 ]]; then
+		depend_clang_llvm_version "$1"
+	fi
+}
+
+BDEPEND="
+	${COMMON_SNAPSHOT_DEPEND}
+	${PYTHON_DEPS}
+	$(python_gen_any_dep '
+		dev-python/setuptools[${PYTHON_USEDEP}]
+	')
+	>=app-arch/gzip-1.7
+	libcxx? ( >=sys-devel/clang-12 )
+	lto? ( $(depend_clang_llvm_versions 12 13 14) )
+	pgo? (
+		>=dev-python/selenium-3.141.0
+		>=dev-util/web_page_replay_go-20220314
+		$(depend_clang_llvm_versions 12 13 14)
+	)
+	dev-lang/perl
+	>=dev-util/gn-0.1807
+	>=dev-util/gperf-3.0.3
+	>=dev-util/ninja-1.7.2
+	dev-vcs/git
+	>=net-libs/nodejs-7.6.0[inspector]
+	>=sys-devel/bison-2.4.3
+	sys-devel/flex
+	virtual/pkgconfig
+	js-type-check? ( virtual/jre )
+"
+
+# These are intended for ebuild maintainer use to force clang if GCC is broken.
+: ${CHROMIUM_FORCE_CLANG=no}
+
+if [[ ${CHROMIUM_FORCE_CLANG} == yes ]]; then
+	BDEPEND+=" >=sys-devel/clang-12"
+fi
+
+if ! has chromium_pkg_die ${EBUILD_DEATH_HOOKS}; then
+	EBUILD_DEATH_HOOKS+=" chromium_pkg_die";
+fi
+
+DISABLE_AUTOFORMATTING="yes"
+DOC_CONTENTS="
+Some web pages may require additional fonts to display properly.
+Try installing some of the following packages if some characters
+are not displayed properly:
+- media-fonts/arphicfonts
+- media-fonts/droid
+- media-fonts/ipamonafont
+- media-fonts/noto
+- media-fonts/ja-ipafonts
+- media-fonts/takao-fonts
+- media-fonts/wqy-microhei
+- media-fonts/wqy-zenhei
+
+To fix broken icons on the Downloads page, you should install an icon
+theme that covers the appropriate MIME types, and configure this as your
+GTK+ icon theme.
+
+For native file dialogs in KDE, install kde-apps/kdialog.
+
+To make password storage work with your desktop environment you may
+have install one of the supported credentials management applications:
+- app-crypt/libsecret (GNOME)
+- kde-frameworks/kwallet (KDE)
+If you have one of above packages installed, but don't want to use
+them in Chromium, then add --password-store=basic to CHROMIUM_FLAGS
+in /etc/chromium/default.
+"
+
+python_check_deps() {
+	has_version -b "dev-python/setuptools[${PYTHON_USEDEP}]"
+}
+
+needs_clang() {
+	[[ ${CHROMIUM_FORCE_CLANG} == yes ]] || use libcxx || use lto || use pgo
+}
+
+llvm_check_deps() {
+	if ! has_version -b "sys-devel/clang:${LLVM_SLOT}" ; then
+		einfo "sys-devel/clang:${LLVM_SLOT} is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+		return 1
+	fi
+
+	if ( use lto || use pgo ) && ! has_version -b "=sys-devel/lld-${LLVM_SLOT}*" ; then
+		einfo "=sys-devel/lld-${LLVM_SLOT}* is missing! Cannot use LLVM slot ${LLVM_SLOT} ..." >&2
+		return 1
+	fi
+
+	einfo "Using LLVM slot ${LLVM_SLOT} to build" >&2
+}
+
+pre_build_checks() {
+	if [[ ${MERGE_TYPE} != binary ]]; then
+		( use lto || use pgo ) && llvm_pkg_setup
+
+		local -x CPP="$(tc-getCXX) -E"
+		if tc-is-gcc && ! ver_test "$(gcc-version)" -ge 9.2; then
+			die "At least gcc 9.2 is required"
+		fi
+		if use pgo && tc-is-cross-compiler; then
+			die "The pgo USE flag cannot be used when cross-compiling"
+		fi
+		if needs_clang || tc-is-clang; then
+			tc-is-cross-compiler && CPP=${CBUILD}-clang++ || CPP=${CHOST}-clang++
+			CPP+=" -E"
+			if ! ver_test "$(clang-major-version)" -ge 12; then
+				die "At least clang 12 is required"
+			fi
+		fi
+	fi
+
+	# Check build requirements, bug #541816 and bug #471810 .
+	CHECKREQS_MEMORY="4G"
+	CHECKREQS_DISK_BUILD="10G"
+	tc-is-cross-compiler && CHECKREQS_DISK_BUILD="13G"
+	if use lto || use pgo; then
+		CHECKREQS_MEMORY="9G"
+		CHECKREQS_DISK_BUILD="12G"
+		tc-is-cross-compiler && CHECKREQS_DISK_BUILD="15G"
+		use pgo && CHECKREQS_DISK_BUILD="19G"
+	fi
+	if ( shopt -s extglob; is-flagq '-g?(gdb)?([1-9])' ); then
+		if use custom-cflags || use component-build; then
+			CHECKREQS_DISK_BUILD="25G"
+		fi
+		if ! use component-build; then
+			CHECKREQS_MEMORY="16G"
+		fi
+	fi
+	check-reqs_pkg_setup
+}
+
+pkg_pretend() {
+	pre_build_checks
+
+	if use headless; then
+		local headless_unused_flags=("cups" "kerberos" "pulseaudio" "vaapi" "wayland")
+		for myiuse in ${headless_unused_flags[@]}; do
+			use ${myiuse} && ewarn "Ignoring USE=${myiuse} since USE=headless is set."
+		done
+	fi
+}
+
+pkg_setup() {
+	pre_build_checks
+
+	chromium_suid_sandbox_check_kernel_config
+
+	# nvidia-drivers does not work correctly with Wayland due to unsupported EGLStreams
+	if use wayland && ! use headless && has_version "x11-drivers/nvidia-drivers"; then
+		ewarn "Proprietary nVidia driver does not work with Wayland. You can disable"
+		ewarn "Wayland by setting DISABLE_OZONE_PLATFORM=true in /etc/chromium/default."
+	fi
+}
+
+src_prepare() {
+	# Calling this here supports resumption via FEATURES=keepwork
+	python_setup
+
+	local PATCHES=(
+		"${WORKDIR}/patches"
+		"${FILESDIR}/chromium-93-InkDropHost-crash.patch"
+		"${FILESDIR}/chromium-98-EnumTable-crash.patch"
+		"${FILESDIR}/chromium-98-gtk4-build.patch"
+		"${FILESDIR}/chromium-use-oauth2-client-switches-as-default.patch"
+		"${FILESDIR}/chromium-shim_headers.patch"
+		"${FILESDIR}/chromium-cross-compile.patch"
+	)
+
+	default
+
+	mkdir -p third_party/node/linux/node-linux-x64/bin || die
+	ln -s "${EPREFIX}"/usr/bin/node third_party/node/linux/node-linux-x64/bin/node || die
+
+	# adjust python interpreter version
+	sed -i -e "s|\(^script_executable = \).*|\1\"${EPYTHON}\"|g" .gn || die
+
+	local keeplibs=(
+		base/third_party/cityhash
+		base/third_party/double_conversion
+		base/third_party/dynamic_annotations
+		base/third_party/icu
+		base/third_party/nspr
+		base/third_party/superfasthash
+		base/third_party/symbolize
+		base/third_party/valgrind
+		base/third_party/xdg_mime
+		base/third_party/xdg_user_dirs
+		buildtools/third_party/libc++
+		buildtools/third_party/libc++abi
+		chrome/third_party/mozilla_security_manager
+		courgette/third_party
+		net/third_party/mozilla_security_manager
+		net/third_party/nss
+		net/third_party/quic
+		net/third_party/uri_template
+		third_party/abseil-cpp
+		third_party/angle
+		third_party/angle/src/common/third_party/base
+		third_party/angle/src/common/third_party/smhasher
+		third_party/angle/src/common/third_party/xxhash
+		third_party/angle/src/third_party/libXNVCtrl
+		third_party/angle/src/third_party/trace_event
+		third_party/angle/src/third_party/volk
+		third_party/apple_apsl
+		third_party/axe-core
+		third_party/blink
+		third_party/boringssl
+		third_party/boringssl/src/third_party/fiat
+		third_party/breakpad
+		third_party/breakpad/breakpad/src/third_party/curl
+		third_party/brotli
+		third_party/catapult
+		third_party/catapult/common/py_vulcanize/third_party/rcssmin
+		third_party/catapult/common/py_vulcanize/third_party/rjsmin
+		third_party/catapult/third_party/beautifulsoup4-4.9.3
+		third_party/catapult/third_party/html5lib-1.1
+		third_party/catapult/third_party/polymer
+		third_party/catapult/third_party/six
+		third_party/catapult/tracing/third_party/d3
+		third_party/catapult/tracing/third_party/gl-matrix
+		third_party/catapult/tracing/third_party/jpeg-js
+		third_party/catapult/tracing/third_party/jszip
+		third_party/catapult/tracing/third_party/mannwhitneyu
+		third_party/catapult/tracing/third_party/oboe
+		third_party/catapult/tracing/third_party/pako
+		third_party/ced
+		third_party/cld_3
+		third_party/closure_compiler
+		third_party/cpuinfo
+		third_party/crashpad
+		third_party/crashpad/crashpad/third_party/lss
+		third_party/crashpad/crashpad/third_party/zlib
+		third_party/crc32c
+		third_party/cros_system_api
+		third_party/dav1d
+		third_party/dawn
+		third_party/dawn/third_party/gn/webgpu-cts
+		third_party/dawn/third_party/khronos
+		third_party/depot_tools
+		third_party/devscripts
+		third_party/devtools-frontend
+		third_party/devtools-frontend/src/front_end/third_party/acorn
+		third_party/devtools-frontend/src/front_end/third_party/additional_readme_paths.json
+		third_party/devtools-frontend/src/front_end/third_party/axe-core
+		third_party/devtools-frontend/src/front_end/third_party/chromium
+		third_party/devtools-frontend/src/front_end/third_party/codemirror
+		third_party/devtools-frontend/src/front_end/third_party/diff
+		third_party/devtools-frontend/src/front_end/third_party/i18n
+		third_party/devtools-frontend/src/front_end/third_party/intl-messageformat
+		third_party/devtools-frontend/src/front_end/third_party/lighthouse
+		third_party/devtools-frontend/src/front_end/third_party/lit-html
+		third_party/devtools-frontend/src/front_end/third_party/lodash-isequal
+		third_party/devtools-frontend/src/front_end/third_party/marked
+		third_party/devtools-frontend/src/front_end/third_party/puppeteer
+		third_party/devtools-frontend/src/front_end/third_party/wasmparser
+		third_party/devtools-frontend/src/test/unittests/front_end/third_party/i18n
+		third_party/devtools-frontend/src/third_party
+		third_party/distributed_point_functions
+		third_party/dom_distiller_js
+		third_party/eigen3
+		third_party/emoji-segmenter
+		third_party/farmhash
+		third_party/fdlibm
+		third_party/fft2d
+		third_party/flatbuffers
+		third_party/fp16
+		third_party/freetype
+		third_party/fusejs
+		third_party/fxdiv
+		third_party/highway
+		third_party/libgifcodec
+		third_party/liburlpattern
+		third_party/libzip
+		third_party/gemmlowp
+		third_party/google_input_tools
+		third_party/google_input_tools/third_party/closure_library
+		third_party/google_input_tools/third_party/closure_library/third_party/closure
+		third_party/googletest
+		third_party/hunspell
+		third_party/iccjpeg
+		third_party/inspector_protocol
+		third_party/jinja2
+		third_party/jsoncpp
+		third_party/jstemplate
+		third_party/khronos
+		third_party/leveldatabase
+		third_party/libaddressinput
+		third_party/libaom
+		third_party/libaom/source/libaom/third_party/fastfeat
+		third_party/libaom/source/libaom/third_party/vector
+		third_party/libaom/source/libaom/third_party/x86inc
+		third_party/libavif
+		third_party/libgav1
+		third_party/libjingle
+		third_party/libjxl
+		third_party/libphonenumber
+		third_party/libsecret
+		third_party/libsrtp
+		third_party/libsync
+		third_party/libudev
+		third_party/libva_protected_content
+		third_party/libvpx
+		third_party/libvpx/source/libvpx/third_party/x86inc
+		third_party/libwebm
+		third_party/libx11
+		third_party/libxcb-keysyms
+		third_party/libxml/chromium
+		third_party/libyuv
+		third_party/llvm
+		third_party/lottie
+		third_party/lss
+		third_party/lzma_sdk
+		third_party/mako
+		third_party/maldoca
+		third_party/maldoca/src/third_party/tensorflow_protos
+		third_party/maldoca/src/third_party/zlibwrapper
+		third_party/markupsafe
+		third_party/mesa
+		third_party/metrics_proto
+		third_party/minigbm
+		third_party/modp_b64
+		third_party/nasm
+		third_party/nearby
+		third_party/neon_2_sse
+		third_party/node
+		third_party/node/node_modules/polymer-bundler/lib/third_party/UglifyJS2
+		third_party/one_euro_filter
+		third_party/openscreen
+		third_party/openscreen/src/third_party/mozilla
+		third_party/openscreen/src/third_party/tinycbor/src/src
+		third_party/ots
+		third_party/pdfium
+		third_party/pdfium/third_party/agg23
+		third_party/pdfium/third_party/base
+		third_party/pdfium/third_party/bigint
+		third_party/pdfium/third_party/freetype
+		third_party/pdfium/third_party/lcms
+		third_party/pdfium/third_party/libopenjpeg20
+		third_party/pdfium/third_party/libpng16
+		third_party/pdfium/third_party/libtiff
+		third_party/pdfium/third_party/skia_shared
+		third_party/perfetto
+		third_party/perfetto/protos/third_party/chromium
+		third_party/pffft
+		third_party/ply
+		third_party/polymer
+		third_party/private-join-and-compute
+		third_party/private_membership
+		third_party/protobuf
+		third_party/protobuf/third_party/six
+		third_party/pthreadpool
+		third_party/pyjson5
+		third_party/qcms
+		third_party/rnnoise
+		third_party/s2cellid
+		third_party/securemessage
+		third_party/shell-encryption
+		third_party/simplejson
+		third_party/skia
+		third_party/skia/include/third_party/skcms
+		third_party/skia/include/third_party/vulkan
+		third_party/skia/third_party/skcms
+		third_party/skia/third_party/vulkan
+		third_party/smhasher
+		third_party/snappy
+		third_party/sqlite
+		third_party/swiftshader
+		third_party/swiftshader/third_party/astc-encoder
+		third_party/swiftshader/third_party/llvm-subzero
+		third_party/swiftshader/third_party/marl
+		third_party/swiftshader/third_party/subzero
+		third_party/swiftshader/third_party/SPIRV-Headers/include/spirv
+		third_party/swiftshader/third_party/SPIRV-Tools
+		third_party/tensorflow-text
+		third_party/tflite
+		third_party/tflite/src/third_party/eigen3
+		third_party/tflite/src/third_party/fft2d
+		third_party/ruy
+		third_party/six
+		third_party/ukey2
+		third_party/unrar
+		third_party/utf
+		third_party/vulkan
+		third_party/web-animations-js
+		third_party/webdriver
+		third_party/webgpu-cts
+		third_party/webrtc
+		third_party/webrtc/common_audio/third_party/ooura
+		third_party/webrtc/common_audio/third_party/spl_sqrt_floor
+		third_party/webrtc/modules/third_party/fft
+		third_party/webrtc/modules/third_party/g711
+		third_party/webrtc/modules/third_party/g722
+		third_party/webrtc/rtc_base/third_party/base64
+		third_party/webrtc/rtc_base/third_party/sigslot
+		third_party/widevine
+		third_party/woff2
+		third_party/wuffs
+		third_party/x11proto
+		third_party/xcbproto
+		third_party/xnnpack
+		third_party/zxcvbn-cpp
+		third_party/zlib/google
+		url/third_party/mozilla
+		v8/src/third_party/siphash
+		v8/src/third_party/valgrind
+		v8/src/third_party/utf8-decoder
+		v8/third_party/inspector_protocol
+		v8/third_party/v8
+
+		# gyp -> gn leftovers
+		base/third_party/libevent
+		third_party/speech-dispatcher
+		third_party/usb_ids
+		third_party/xdg-utils
+	)
+	if ! use system-ffmpeg; then
+		keeplibs+=( third_party/ffmpeg third_party/opus )
+	fi
+	if ! use system-icu; then
+		keeplibs+=( third_party/icu )
+	fi
+	if ! use system-png; then
+		keeplibs+=( third_party/libpng )
+	fi
+	if use libcxx; then
+		keeplibs+=( third_party/re2 )
+	fi
+	if use system-harfbuzz; then
+		keeplibs+=( third_party/harfbuzz-ng/utils )
+	else
+		keeplibs+=( third_party/harfbuzz-ng )
+	fi
+	if use wayland && ! use headless ; then
+		keeplibs+=( third_party/wayland )
+	fi
+	if use arm64 || use ppc64 ; then
+		keeplibs+=( third_party/swiftshader/third_party/llvm-10.0 )
+	fi
+	# we need to generate ppc64 stuff because upstream does not ship it yet
+	# it has to be done before unbundling.
+	if use ppc64; then
+		pushd third_party/libvpx >/dev/null || die
+		mkdir -p source/config/linux/ppc64 || die
+		# requires git and clang, bug #832803
+		sed -i -e "s|^update_readme||g; s|clang-format|${EPREFIX}/bin/true|g" \
+			generate_gni.sh || die
+		./generate_gni.sh || die
+		popd >/dev/null || die
+
+		pushd third_party/ffmpeg >/dev/null || die
+		cp libavcodec/ppc/h264dsp.c libavcodec/ppc/h264dsp_ppc.c || die
+		cp libavcodec/ppc/h264qpel.c libavcodec/ppc/h264qpel_ppc.c || die
+		popd >/dev/null || die
+	fi
+
+	# Remove most bundled libraries. Some are still needed.
+	build/linux/unbundle/remove_bundled_libraries.py "${keeplibs[@]}" --do-remove || die
+
+	if use js-type-check; then
+		ln -s "${EPREFIX}"/usr/bin/java third_party/jdk/current/bin/java || die
+	fi
+
+	# bundled eu-strip is for amd64 only and we don't want to pre-stripped binaries
+	mkdir -p buildtools/third_party/eu-strip/bin || die
+	ln -s "${EPREFIX}"/bin/true buildtools/third_party/eu-strip/bin/eu-strip || die
+}
+
+chromium_configure() {
+	# Calling this here supports resumption via FEATURES=keepwork
+	python_setup
+
+	local myconf_gn=""
+
+	# Make sure the build system will use the right tools, bug #340795.
+	tc-export AR CC CXX NM
+
+	if needs_clang && ! tc-is-clang; then
+		# Force clang since gcc is either broken or build is using libcxx.
+		if tc-is-cross-compiler; then
+			CC="${CBUILD}-clang -target ${CHOST} --sysroot ${ESYSROOT}"
+			CXX="${CBUILD}-clang++ -target ${CHOST} --sysroot ${ESYSROOT}"
+			BUILD_CC=${CBUILD}-clang
+			BUILD_CXX=${CBUILD}-clang++
+		else
+			CC=${CHOST}-clang
+			CXX=${CHOST}-clang++
+		fi
+		strip-unsupported-flags
+	fi
+
+	if tc-is-clang; then
+		myconf_gn+=" is_clang=true clang_use_chrome_plugins=false"
+	else
+		myconf_gn+=" is_clang=false"
+	fi
+
+	# Force lld for lto or pgo builds only, otherwise disable, bug 641556
+	if use lto || use pgo; then
+		myconf_gn+=" use_lld=true"
+	else
+		myconf_gn+=" use_lld=false"
+	fi
+
+	if use lto || use pgo; then
+		AR=llvm-ar
+		NM=llvm-nm
+		if tc-is-cross-compiler; then
+			BUILD_AR=llvm-ar
+			BUILD_NM=llvm-nm
+		fi
+	fi
+
+	# Define a custom toolchain for GN
+	myconf_gn+=" custom_toolchain=\"//build/toolchain/linux/unbundle:default\""
+
+	if tc-is-cross-compiler; then
+		tc-export BUILD_{AR,CC,CXX,NM}
+		myconf_gn+=" host_toolchain=\"//build/toolchain/linux/unbundle:host\""
+		myconf_gn+=" v8_snapshot_toolchain=\"//build/toolchain/linux/unbundle:host\""
+		myconf_gn+=" pkg_config=\"$(tc-getPKG_CONFIG)\""
+		myconf_gn+=" host_pkg_config=\"$(tc-getBUILD_PKG_CONFIG)\""
+
+		# setup cups-config, build system only uses --libs option
+		if use cups; then
+			mkdir "${T}/cups-config" || die
+			cp "${ESYSROOT}/usr/bin/${CHOST}-cups-config" "${T}/cups-config/cups-config" || die
+			export PATH="${PATH}:${T}/cups-config"
+		fi
+
+		# Don't inherit PKG_CONFIG_PATH from environment
+		local -x PKG_CONFIG_PATH=
+	else
+		myconf_gn+=" host_toolchain=\"//build/toolchain/linux/unbundle:default\""
+	fi
+
+	# GN needs explicit config for Debug/Release as opposed to inferring it from build directory.
+	myconf_gn+=" is_debug=false"
+
+	# enable DCHECK with USE=debug only, increases chrome binary size by 30%, bug #811138.
+	# DCHECK is fatal by default, make it configurable at runtime, #bug 807881.
+	myconf_gn+=" dcheck_always_on=$(usex debug true false)"
+	myconf_gn+=" dcheck_is_configurable=$(usex debug true false)"
+
+	# Component build isn't generally intended for use by end users. It's mostly useful
+	# for development and debugging.
+	myconf_gn+=" is_component_build=$(usex component-build true false)"
+
+	# Disable nacl, we can't build without pnacl (http://crbug.com/269560).
+	myconf_gn+=" enable_nacl=false"
+
+	# Use system-provided libraries.
+	# TODO: freetype -- remove sources (https://bugs.chromium.org/p/pdfium/issues/detail?id=733).
+	# TODO: use_system_hunspell (upstream changes needed).
+	# TODO: use_system_protobuf (bug #525560).
+	# TODO: use_system_sqlite (http://crbug.com/22208).
+
+	# libevent: https://bugs.gentoo.org/593458
+	local gn_system_libraries=(
+		flac
+		fontconfig
+		freetype
+		# Need harfbuzz_from_pkgconfig target
+		#harfbuzz-ng
+		libdrm
+		libjpeg
+		libwebp
+		libxml
+		libxslt
+		openh264
+		zlib
+	)
+	if use system-ffmpeg; then
+		gn_system_libraries+=( ffmpeg opus )
+	fi
+	if use system-icu; then
+		gn_system_libraries+=( icu )
+	fi
+	if use system-png; then
+		gn_system_libraries+=( libpng )
+	fi
+	# re2 library interface relies on std::string and std::vector
+	if ! use libcxx; then
+		gn_system_libraries+=( re2 )
+	fi
+	build/linux/unbundle/replace_gn_files.py --system-libraries "${gn_system_libraries[@]}" || die
+
+	# See dependency logic in third_party/BUILD.gn
+	myconf_gn+=" use_system_harfbuzz=$(usex system-harfbuzz true false)"
+
+	# Disable deprecated libgnome-keyring dependency, bug #713012
+	myconf_gn+=" use_gnome_keyring=false"
+
+	# Optional dependencies.
+	myconf_gn+=" enable_js_type_check=$(usex js-type-check true false)"
+	myconf_gn+=" enable_hangout_services_extension=$(usex hangouts true false)"
+	myconf_gn+=" enable_widevine=$(usex widevine true false)"
+
+	if use headless; then
+		myconf_gn+=" use_cups=false"
+		myconf_gn+=" use_kerberos=false"
+		myconf_gn+=" use_pulseaudio=false"
+		myconf_gn+=" use_vaapi=false"
+		myconf_gn+=" rtc_use_pipewire=false"
+	else
+		myconf_gn+=" use_cups=$(usex cups true false)"
+		myconf_gn+=" use_kerberos=$(usex kerberos true false)"
+		myconf_gn+=" use_pulseaudio=$(usex pulseaudio true false)"
+		myconf_gn+=" use_vaapi=$(usex vaapi true false)"
+		myconf_gn+=" rtc_use_pipewire=$(usex screencast true false)"
+		myconf_gn+=" gtk_version=$(usex gtk4 4 3)"
+	fi
+
+	# TODO: link_pulseaudio=true for GN.
+
+	myconf_gn+=" disable_fieldtrial_testing_config=true"
+
+	# Never use bundled gold binary. Disable gold linker flags for now.
+	# Do not use bundled clang.
+	# Trying to use gold results in linker crash.
+	myconf_gn+=" use_gold=false use_sysroot=false"
+	myconf_gn+=" use_custom_libcxx=$(usex libcxx true false)"
+
+	# Disable pseudolocales, only used for testing
+	myconf_gn+=" enable_pseudolocales=false"
+
+	# Disable code formating of generated files
+	myconf_gn+=" blink_enable_generated_code_formatting=false"
+
+	ffmpeg_branding="$(usex proprietary-codecs Chrome Chromium)"
+	myconf_gn+=" proprietary_codecs=$(usex proprietary-codecs true false)"
+	myconf_gn+=" ffmpeg_branding=\"${ffmpeg_branding}\""
+
+	# Set up Google API keys, see http://www.chromium.org/developers/how-tos/api-keys .
+	# Note: these are for Gentoo use ONLY. For your own distribution,
+	# please get your own set of keys. Feel free to contact chromium@gentoo.org
+	# for more info. The OAuth2 credentials, however, have been left out.
+	# Those OAuth2 credentials have been broken for quite some time anyway.
+	# Instead we apply a patch to use the --oauth2-client-id= and
+	# --oauth2-client-secret= switches for setting GOOGLE_DEFAULT_CLIENT_ID and
+	# GOOGLE_DEFAULT_CLIENT_SECRET at runtime. This allows signing into
+	# Chromium without baked-in values.
+	local google_api_key="AIzaSyDEAOvatFo0eTgsV_ZlEzx0ObmepsMzfAc"
+	myconf_gn+=" google_api_key=\"${google_api_key}\""
+	local myarch="$(tc-arch)"
+
+	# Avoid CFLAGS problems, bug #352457, bug #390147.
+	if ! use custom-cflags; then
+		replace-flags "-Os" "-O2"
+		strip-flags
+
+		# Debug info section overflows without component build
+		# Prevent linker from running out of address space, bug #471810 .
+		if ! use component-build || use x86; then
+			filter-flags "-g*"
+		fi
+
+		# Prevent libvpx build failures. Bug 530248, 544702, 546984.
+		if [[ ${myarch} == amd64 || ${myarch} == x86 ]]; then
+			filter-flags -mno-mmx -mno-sse2 -mno-ssse3 -mno-sse4.1 -mno-avx -mno-avx2 -mno-fma -mno-fma4
+		fi
+	fi
+
+	if [[ $myarch = amd64 ]] ; then
+		myconf_gn+=" target_cpu=\"x64\""
+		ffmpeg_target_arch=x64
+	elif [[ $myarch = x86 ]] ; then
+		myconf_gn+=" target_cpu=\"x86\""
+		ffmpeg_target_arch=ia32
+
+		# This is normally defined by compiler_cpu_abi in
+		# build/config/compiler/BUILD.gn, but we patch that part out.
+		append-flags -msse2 -mfpmath=sse -mmmx
+	elif [[ $myarch = arm64 ]] ; then
+		myconf_gn+=" target_cpu=\"arm64\""
+		ffmpeg_target_arch=arm64
+	elif [[ $myarch = arm ]] ; then
+		myconf_gn+=" target_cpu=\"arm\""
+		ffmpeg_target_arch=$(usex cpu_flags_arm_neon arm-neon arm)
+	elif [[ $myarch = ppc64 ]] ; then
+		myconf_gn+=" target_cpu=\"ppc64\""
+		ffmpeg_target_arch=ppc64
+	else
+		die "Failed to determine target arch, got '$myarch'."
+	fi
+
+	# Make sure that -Werror doesn't get added to CFLAGS by the build system.
+	# Depending on GCC version the warnings are different and we don't want
+	# the build to fail because of that.
+	myconf_gn+=" treat_warnings_as_errors=false"
+
+	# Disable fatal linker warnings, bug 506268.
+	myconf_gn+=" fatal_linker_warnings=false"
+
+	# Disable external code space for V8 for ppc64. It is disabled for ppc64
+	# by default, but cross-compiling on amd64 enables it again.
+	if tc-is-cross-compiler; then
+		if ! use amd64 && ! use arm64; then
+			myconf_gn+=" v8_enable_external_code_space=false"
+		fi
+	fi
+
+	# Bug 491582.
+	export TMPDIR="${WORKDIR}/temp"
+	mkdir -p -m 755 "${TMPDIR}" || die
+
+	# https://bugs.gentoo.org/654216
+	addpredict /dev/dri/ #nowarn
+
+	#if ! use system-ffmpeg; then
+	if false; then
+		local build_ffmpeg_args=""
+		if use pic && [[ "${ffmpeg_target_arch}" == "ia32" ]]; then
+			build_ffmpeg_args+=" --disable-asm"
+		fi
+
+		# Re-configure bundled ffmpeg. See bug #491378 for example reasons.
+		einfo "Configuring bundled ffmpeg..."
+		pushd third_party/ffmpeg > /dev/null || die
+		chromium/scripts/build_ffmpeg.py linux ${ffmpeg_target_arch} \
+			--branding ${ffmpeg_branding} -- ${build_ffmpeg_args} || die
+		chromium/scripts/copy_config.sh || die
+		chromium/scripts/generate_gn.py || die
+		popd > /dev/null || die
+	fi
+
+	# Disable unknown warning message from clang.
+	if tc-is-clang; then
+		append-flags -Wno-unknown-warning-option
+		if tc-is-cross-compiler; then
+			export BUILD_CXXFLAGS+=" -Wno-unknown-warning-option"
+			export BUILD_CFLAGS+=" -Wno-unknown-warning-option"
+		fi
+	fi
+
+	# Disable opaque pointers, https://crbug.com/1316298
+	if tc-is-clang; then
+		if test-flag-CXX -Xclang -no-opaque-pointers; then
+			append-flags -Xclang -no-opaque-pointers
+			if tc-is-cross-compiler; then
+				export BUILD_CXXFLAGS+=" -Xclang -no-opaque-pointers"
+				export BUILD_CFLAGS+=" -Xclang -no-opaque-pointers"
+			fi
+		fi
+	fi
+
+	# Explicitly disable ICU data file support for system-icu/headless builds.
+	if use system-icu || use headless; then
+		myconf_gn+=" icu_use_data_file=false"
+	fi
+
+	# Enable ozone wayland and/or headless support
+	myconf_gn+=" use_ozone=true ozone_auto_platforms=false"
+	myconf_gn+=" ozone_platform_headless=true"
+	if use headless; then
+		myconf_gn+=" ozone_platform=\"headless\""
+		myconf_gn+=" use_xkbcommon=false use_gtk=false"
+		myconf_gn+=" use_glib=false use_gio=false"
+		myconf_gn+=" use_pangocairo=false use_alsa=false"
+		myconf_gn+=" use_libpci=false use_udev=false"
+		myconf_gn+=" enable_print_preview=false"
+		myconf_gn+=" enable_remoting=false"
+	else
+		myconf_gn+=" use_system_libdrm=true"
+		myconf_gn+=" use_system_minigbm=true"
+		myconf_gn+=" use_xkbcommon=true"
+		myconf_gn+=" ozone_platform_x11=$(usex X true false)"
+		myconf_gn+=" ozone_platform_wayland=$(usex wayland true false)"
+		myconf_gn+=" ozone_platform=$(usex wayland \"wayland\" \"x11\")"
+	fi
+
+	# Enable official builds
+	myconf_gn+=" is_official_build=$(usex official true false)"
+	myconf_gn+=" use_thin_lto=$(usex lto true false)"
+	myconf_gn+=" thin_lto_enable_optimizations=$(usex lto true false)"
+	if use official; then
+		# Allow building against system libraries in official builds
+		sed -i 's/OFFICIAL_BUILD/GOOGLE_CHROME_BUILD/' \
+			tools/generate_shim_headers/generate_shim_headers.py || die
+		# Disable CFI: unsupported for GCC, requires clang+lto+lld
+		myconf_gn+=" is_cfi=false"
+		# Don't add symbols to build
+		myconf_gn+=" symbol_level=0"
+	fi
+
+	if use pgo; then
+		myconf_gn+=" chrome_pgo_phase=${1}"
+		if [[ "$1" == "2" ]]; then
+			myconf_gn+=" pgo_data_path=\"${2}\""
+		fi
+	else
+		# Disable PGO, because profile data is only compatible with >=clang-11
+		myconf_gn+=" chrome_pgo_phase=0"
+	fi
+
+	einfo "Configuring Chromium..."
+	set -- gn gen --args="${myconf_gn} ${EXTRA_GN}" out/Release
+	echo "$@"
+	"$@" || die
+}
+
+src_configure() {
+	chromium_configure $(usex pgo 1 0)
+}
+
+chromium_compile() {
+	# Final link uses lots of file descriptors.
+	ulimit -n 2048
+
+	# Calling this here supports resumption via FEATURES=keepwork
+	python_setup
+
+	# Don't inherit PYTHONPATH from environment, bug #789021, #812689
+	local -x PYTHONPATH=
+
+	#"${EPYTHON}" tools/clang/scripts/update.py --force-local-build --gcc-toolchain /usr --skip-checkout --use-system-cmake --without-android || die
+
+	# Build mksnapshot and pax-mark it.
+	local x
+	for x in mksnapshot v8_context_snapshot_generator; do
+		if tc-is-cross-compiler; then
+			eninja -C out/Release "host/${x}"
+			pax-mark m "out/Release/host/${x}"
+		else
+			eninja -C out/Release "${x}"
+			pax-mark m "out/Release/${x}"
+		fi
+	done
+
+	# Even though ninja autodetects number of CPUs, we respect
+	# user's options, for debugging with -j 1 or any other reason.
+	eninja -C out/Release chrome chromedriver
+	use suid && eninja -C out/Release chrome_sandbox
+
+	pax-mark m out/Release/chrome
+}
+
+# This function is called from virtx, and must always return so that Xvfb
+# session isn't left running. If we return 1, virtx will call die().
+chromium_profile() {
+	einfo "Profiling for PGO"
+
+	pushd "${WORKDIR}/chromium-profiler-"* >/dev/null || return 1
+
+	# Remove old profdata in case profiling was interrupted.
+	rm -rf "${1}" || return 1
+
+	if ! "${EPYTHON}" ./chromium_profiler.py \
+	     --chrome-executable "${S}/out/Release/chrome" \
+	     --chromedriver-executable "${S}/out/Release/chromedriver.unstripped" \
+	     --add-arg no-sandbox --add-arg disable-dev-shm-usage \
+	     --profile-output "${1}"; then
+		eerror "Profiling failed"
+		return 1
+	fi
+
+	popd >/dev/null || return 1
+}
+
+src_compile() {
+	if use pgo; then
+		local profdata
+
+		profdata="${WORKDIR}/chromium.profdata"
+
+		if [[ ! -e "${WORKDIR}/.pgo-profiled" ]]; then
+			chromium_compile
+			virtx chromium_profile "$profdata"
+
+			touch "${WORKDIR}/.pgo-profiled"
+		fi
+
+		if [[ ! -e "${WORKDIR}/.pgo-phase-2-configured" ]]; then
+			# Remove phase 1 output
+			rm -rf out/Release
+
+			chromium_configure 2 "$profdata"
+
+			touch "${WORKDIR}/.pgo-phase-2-configured"
+		fi
+
+		if [[ ! -e "${WORKDIR}/.pgo-phase-2-compiled" ]]; then
+			chromium_compile
+			touch "${WORKDIR}/.pgo-phase-2-compiled"
+		fi
+	else
+		chromium_compile
+	fi
+
+	mv out/Release/chromedriver{.unstripped,} || die
+
+	# Build manpage; bug #684550
+	sed -e 's|@@PACKAGE@@|chromium-browser|g;
+		s|@@MENUNAME@@|Chromium|g;' \
+		chrome/app/resources/manpage.1.in > \
+		out/Release/chromium-browser.1 || die
+
+	# Build desktop file; bug #706786
+	sed -e 's|@@MENUNAME@@|Chromium|g;
+		s|@@USR_BIN_SYMLINK_NAME@@|chromium-browser|g;
+		s|@@PACKAGE@@|chromium-browser|g;
+		s|\(^Exec=\)/usr/bin/|\1|g;' \
+		chrome/installer/linux/common/desktop.template > \
+		out/Release/chromium-browser-chromium.desktop || die
+
+	# Build vk_swiftshader_icd.json; bug #827861
+	sed -e 's|${ICD_LIBRARY_PATH}|./libvk_swiftshader.so|g' \
+		third_party/swiftshader/src/Vulkan/vk_swiftshader_icd.json.tmpl > \
+		out/Release/vk_swiftshader_icd.json || die
+}
+
+src_install() {
+	local CHROMIUM_HOME="/usr/$(get_libdir)/chromium-browser"
+	exeinto "${CHROMIUM_HOME}"
+	doexe out/Release/chrome
+
+	if use suid; then
+		newexe out/Release/chrome_sandbox chrome-sandbox
+		fperms 4755 "${CHROMIUM_HOME}/chrome-sandbox"
+	fi
+
+	doexe out/Release/chromedriver
+	doexe out/Release/chrome_crashpad_handler
+
+	ozone_auto_session () {
+		use X && use wayland && ! use headless && echo true || echo false
+	}
+	local sedargs=( -e
+			"s:/usr/lib/:/usr/$(get_libdir)/:g;
+			s:@@OZONE_AUTO_SESSION@@:$(ozone_auto_session):g"
+	)
+	sed "${sedargs[@]}" "${FILESDIR}/chromium-launcher-r7.sh" > chromium-launcher.sh || die
+	doexe chromium-launcher.sh
+
+	# It is important that we name the target "chromium-browser",
+	# xdg-utils expect it; bug #355517.
+	dosym "${CHROMIUM_HOME}/chromium-launcher.sh" /usr/bin/chromium-browser
+	# keep the old symlink around for consistency
+	dosym "${CHROMIUM_HOME}/chromium-launcher.sh" /usr/bin/chromium
+
+	dosym "${CHROMIUM_HOME}/chromedriver" /usr/bin/chromedriver
+
+	# Allow users to override command-line options, bug #357629.
+	insinto /etc/chromium
+	newins "${FILESDIR}/chromium.default" "default"
+
+	pushd out/Release/locales > /dev/null || die
+	chromium_remove_language_paks
+	popd
+
+	insinto "${CHROMIUM_HOME}"
+	doins out/Release/*.bin
+	doins out/Release/*.pak
+	(
+		shopt -s nullglob
+		local files=(out/Release/*.so out/Release/*.so.[0-9])
+		[[ ${#files[@]} -gt 0 ]] && doins "${files[@]}"
+	)
+
+	if ! use system-icu && ! use headless; then
+		doins out/Release/icudtl.dat
+	fi
+
+	doins -r out/Release/locales
+	doins -r out/Release/MEIPreload
+
+	# Install vk_swiftshader_icd.json; bug #827861
+	doins out/Release/vk_swiftshader_icd.json
+
+	if [[ -d out/Release/swiftshader ]]; then
+		insinto "${CHROMIUM_HOME}/swiftshader"
+		doins out/Release/swiftshader/*.so
+	fi
+
+	# Install icons
+	local branding size
+	for size in 16 24 32 48 64 128 256 ; do
+		case ${size} in
+			16|32) branding="chrome/app/theme/default_100_percent/chromium" ;;
+				*) branding="chrome/app/theme/chromium" ;;
+		esac
+		newicon -s ${size} "${branding}/product_logo_${size}.png" \
+			chromium-browser.png
+	done
+
+	# Install desktop entry
+	domenu out/Release/chromium-browser-chromium.desktop
+
+	# Install GNOME default application entry (bug #303100).
+	insinto /usr/share/gnome-control-center/default-apps
+	newins "${FILESDIR}"/chromium-browser.xml chromium-browser.xml
+
+	# Install manpage; bug #684550
+	doman out/Release/chromium-browser.1
+	dosym chromium-browser.1 /usr/share/man/man1/chromium.1
+
+	readme.gentoo_create_doc
+}
+
+pkg_postrm() {
+	xdg_icon_cache_update
+	xdg_desktop_database_update
+}
+
+pkg_postinst() {
+	xdg_icon_cache_update
+	xdg_desktop_database_update
+	readme.gentoo_print_elog
+
+	if ! use headless; then
+		if use vaapi; then
+			elog "VA-API is disabled by default at runtime. You have to enable it"
+			elog "by adding --enable-features=VaapiVideoDecoder to CHROMIUM_FLAGS"
+			elog "in /etc/chromium/default."
+		fi
+		if use screencast; then
+			elog "Screencast is disabled by default at runtime. Either enable it"
+			elog "by navigating to chrome://flags/#enable-webrtc-pipewire-capturer"
+			elog "inside Chromium or add --enable-features=WebRTCPipeWireCapturer"
+			elog "to CHROMIUM_FLAGS in /etc/chromium/default."
+		fi
+		if use gtk4; then
+			elog "Chromium prefers GTK3 over GTK4 at runtime. To override this"
+			elog "behavior you need to pass --gtk-version=4, e.g. by adding it"
+			elog "to CHROMIUM_FLAGS in /etc/chromium/default."
+		fi
+	fi
+}
diff --git a/www-client/chromium/metadata.xml b/www-client/chromium/metadata.xml
index d941cc3a7e28..8cfa20f11dce 100644
--- a/www-client/chromium/metadata.xml
+++ b/www-client/chromium/metadata.xml
@@ -15,6 +15,7 @@
 		<flag name="libcxx">Use bundled libc++ instead of libstdc++ for building.</flag>
 		<flag name="lto">Build with Link Time Optimizations (via clang's ThinLTO)</flag>
 		<flag name="official">Enable Official build instead of Developer build.</flag>
+		<flag name="pgo">Build with Profile Guided Optimizations (2-stage compilation)</flag>
 		<flag name="pic">Disable optimized assembly code that is not PIC friendly</flag>
 		<flag name="proprietary-codecs">Enable codecs for patent-encumbered audio and video formats.</flag>
 		<flag name="screencast">Enable support for remote desktop and screen cast using <pkg>media-video/pipewire</pkg></flag>