dev-util/electron: Add ebuild for Github's Electron (v0.36.9)

Electron is an application framework built on top of Chromium and NodeJS.
It allows creating cross-platform desktop apps using Web tech. [1]

The main user of Electron is the Atom IDE [2].  Microsoft Visual Studio
Code is also based on Electron.  It is also useful for the creation of
desktop wrappers for popular web services, e.g. Google Music [3].

Unfortunately, current upstream's approach to "building Electron from
source" involves downloading a pre-built libchromiumcontent.so binary
from the Internet, which poses obvious security and compatibility risks.

This ebuild is based heavily on the Chromium ebuild and follows similar
unbunling policy.

Additionally, Electron-specific NodeJS headers are installed to
/usr/include so that native modules built for Electron-based apps can be
compiled against the correct version of NodeJS embedded in Electron.

[1] http://electron.atom.io/
[2] http://atom.io/
[3] https://github.com/twolfson/google-music-electron

Gentoo-Bug: https://bugs.gentoo.org/579116
Closes: https://github.com/gentoo/gentoo/pull/1200
Package-Manager: portage-2.2.28

Acked-by: Mike Gilbert <floppym@gentoo.org>
Signed-off-by: Patrice Clement <monsieurp@gentoo.org>

11 files changed, 535 insertions, 0 deletions

diff --git a/dev-util/electron/files/brightray-gentoo-build-fixes.patch b/dev-util/electron/files/brightray-gentoo-build-fixes.patch
new file mode 100644
index 000000000000..a67808457752
--- /dev/null
+++ b/dev-util/electron/files/brightray-gentoo-build-fixes.patch
@@ -0,0 +1,81 @@
+From c9e2e0237170884bc1069a64f2635bb1ffc1b948 Mon Sep 17 00:00:00 2001
+From: Elvis Pranskevichus <elvis@magic.io>
+Date: Mon, 8 Feb 2016 15:14:58 -0500
+Subject: [PATCH] brightray build fixes
+
+---
+ brightray.gyp  |  5 +++--
+ brightray.gypi | 21 ++++++++-------------
+ 2 files changed, 11 insertions(+), 15 deletions(-)
+
+diff --git a/brightray.gyp b/brightray.gyp
+index d7120ea..6150318 100644
+--- a/brightray.gyp
++++ b/brightray.gyp
+@@ -9,6 +9,9 @@
+   'targets': [
+     {
+       'target_name': 'brightray',
++      'dependencies': [
++        '<(libchromiumcontent_src_dir)/chromiumcontent/chromiumcontent.gyp:chromiumcontent_all'
++      ],
+       'type': 'static_library',
+       'include_dirs': [
+         '.',
+@@ -100,8 +103,6 @@
+             }, {
+               'link_settings': {
+                 'libraries': [
+-                  # Link with ffmpeg.
+-                  '<(libchromiumcontent_dir)/libffmpeg.so',
+                   # Following libraries are required by libchromiumcontent:
+                   '-lasound',
+                   '-lcap',
+diff --git a/brightray.gypi b/brightray.gypi
+index 4513fa9..95bdfa1 100644
+--- a/brightray.gypi
++++ b/brightray.gypi
+@@ -1,9 +1,14 @@
+ {
+-  'includes': [
+-    'vendor/download/libchromiumcontent/filenames.gypi',
+-  ],
+   'variables': {
+     'libchromiumcontent_component%': 1,
++    'libchromiumcontent_src_dir': '<(DEPTH)',
++    'libchromiumcontent_shared_libraries_dir': '<(SHARED_INTERMEDIATE_DIR)',
++    'libchromiumcontent_static_libraries_dir': '<(SHARED_INTERMEDIATE_DIR)',
++    'libchromiumcontent_shared_libraries': [],
++    'libchromiumcontent_static_libraries': [],
++    'libchromiumcontent_shared_v8_libraries': [],
++    'libchromiumcontent_static_v8_libraries': [],
++    'pkg-config%': 'pkg-config',
+     'conditions': [
+       # The "libchromiumcontent_component" is defined when calling "gyp".
+       ['libchromiumcontent_component', {
+@@ -258,22 +263,12 @@
+         'conditions': [
+           ['OS=="linux"', {
+             'cflags': [
+-              '-O2',
+-              # Generate symbols, will be stripped later.
+-              '-g',
+-              # Don't emit the GCC version ident directives, they just end up
+-              # in the .comment section taking up binary size.
+-              '-fno-ident',
+               # Put data and code in their own sections, so that unused symbols
+               # can be removed at link time with --gc-sections.
+               '-fdata-sections',
+               '-ffunction-sections',
+             ],
+             'ldflags': [
+-              # Specifically tell the linker to perform optimizations.
+-              # See http://lwn.net/Articles/192624/ .
+-              '-Wl,-O1',
+-              '-Wl,--as-needed',
+               '-Wl,--gc-sections',
+             ],
+           }],  # OS=="linux"
+-- 
+2.7.3
+
diff --git a/dev-util/electron/files/chromium-disable-widevine.patch b/dev-util/electron/files/chromium-disable-widevine.patch
new file mode 100644
index 000000000000..5b166463c88c
--- /dev/null
+++ b/dev-util/electron/files/chromium-disable-widevine.patch
@@ -0,0 +1,9 @@
+--- a/third_party/widevine/cdm/stub/widevine_cdm_version.h
++++ b/third_party/widevine/cdm/stub/widevine_cdm_version.h
+@@ -10,6 +10,5 @@
+
+ #include "third_party/widevine/cdm/widevine_cdm_common.h"
+
+-#define WIDEVINE_CDM_AVAILABLE
+
+ #endif  // WIDEVINE_CDM_VERSION_H_
diff --git a/dev-util/electron/files/chromium-lto-fixes.patch b/dev-util/electron/files/chromium-lto-fixes.patch
new file mode 100644
index 000000000000..7de3df1b26f6
--- /dev/null
+++ b/dev-util/electron/files/chromium-lto-fixes.patch
@@ -0,0 +1,26 @@
+diff --git a/build/common.gypi.orig b/build/common.gypi
+index cce7b3c..3b905c0 100644
+--- a/build/common.gypi.orig
++++ b/build/common.gypi
+@@ -6096,7 +6096,7 @@
+         'target_conditions': [
+           ['_toolset=="target"', {
+             'ldflags': [
+-              '-flto=32',
++              '-flto=4'
+             ],
+           }],
+         ],
+diff --git a/build/android/disable_gcc_lto.gypi.orig b/build/android/disable_gcc_lto.gypi
+index a733c7a..57570f8 100644
+--- a/build/android/disable_gcc_lto.gypi.orig
++++ b/build/android/disable_gcc_lto.gypi
+@@ -8,7 +8,7 @@
+   'target_conditions': [
+     ['_toolset=="target"', {
+       'conditions': [
+-        ['OS=="android" and clang==0 and (use_lto==1 or use_lto_o2==1)', {
++        ['(OS=="android" or OS=="linux") and clang==0 and (use_lto==1 or use_lto_o2==1)', {
+           'cflags!': [
+             '-flto',
+             '-ffat-lto-objects',
diff --git a/dev-util/electron/files/chromium-remove-gardiner-mod-font.patch b/dev-util/electron/files/chromium-remove-gardiner-mod-font.patch
new file mode 100644
index 000000000000..cf1955ffbfd2
--- /dev/null
+++ b/dev-util/electron/files/chromium-remove-gardiner-mod-font.patch
@@ -0,0 +1,13 @@
+diff --git a/test_runner.gyp b/test_runner.gyp
+index 30ffa75..8838bdf 100644
+--- a/components/test_runner/test_runner.gyp
++++ b/components/test_runner/test_runner.gyp
+@@ -162,8 +162,6 @@
+             'files': [
+               'resources/fonts/AHEM____.TTF',
+               'resources/fonts/fonts.conf',
+-              '../../third_party/gardiner_mod/GardinerModBug.ttf',
+-              '../../third_party/gardiner_mod/GardinerModCat.ttf',
+             ]
+           }],
+         }],
diff --git a/dev-util/electron/files/chromium-shared-v8.patch b/dev-util/electron/files/chromium-shared-v8.patch
new file mode 100644
index 000000000000..67d97c8b3974
--- /dev/null
+++ b/dev-util/electron/files/chromium-shared-v8.patch
@@ -0,0 +1,15 @@
+diff --git a/v8/tools/gyp/v8.gyp.orig b/v8/tools/gyp/v8.gyp
+index bcb5801..3162456 100644
+--- a/v8/tools/gyp/v8.gyp.orig
++++ b/v8/tools/gyp/v8.gyp
+@@ -48,8 +48,8 @@
+         }, {
+           'toolsets': ['target'],
+         }],
+-        ['component=="shared_library"', {
+-          'type': '<(component)',
++        ['v8_target_type=="shared_library"', {
++          'type': 'shared_library',
+           'sources': [
+             # Note: on non-Windows we still build this file so that gyp
+             # has some sources to link into the component.
diff --git a/dev-util/electron/files/chromium-system-ffmpeg-r0.patch b/dev-util/electron/files/chromium-system-ffmpeg-r0.patch
new file mode 100644
index 000000000000..667e0ecb2a72
--- /dev/null
+++ b/dev-util/electron/files/chromium-system-ffmpeg-r0.patch
@@ -0,0 +1,54 @@
+diff --git a/media/ffmpeg/ffmpeg_common.h b/media/ffmpeg/ffmpeg_common.h
+index 677bd76..23a21f8 100644
+--- a/media/ffmpeg/ffmpeg_common.h
++++ b/media/ffmpeg/ffmpeg_common.h
+@@ -19,20 +19,12 @@
+ 
+ // Include FFmpeg header files.
+ extern "C" {
+-// Disable deprecated features which result in spammy compile warnings.  This
+-// list of defines must mirror those in the 'defines' section of the ffmpeg.gyp
+-// file or the headers below will generate different structures.
+-#define FF_API_PIX_FMT_DESC 0
+-#define FF_API_OLD_DECODE_AUDIO 0
+-#define FF_API_DESTRUCT_PACKET 0
+-#define FF_API_GET_BUFFER 0
+ 
+ // Temporarily disable possible loss of data warning.
+ // TODO(scherkus): fix and upstream the compiler warnings.
+ MSVC_PUSH_DISABLE_WARNING(4244);
+ #include <libavcodec/avcodec.h>
+ #include <libavformat/avformat.h>
+-#include <libavformat/internal.h>
+ #include <libavformat/avio.h>
+ #include <libavutil/avutil.h>
+ #include <libavutil/imgutils.h>
+diff --git a/media/filters/ffmpeg_demuxer.cc b/media/filters/ffmpeg_demuxer.cc
+index 155e980..7ba327a 100644
+--- a/media/filters/ffmpeg_demuxer.cc
++++ b/media/filters/ffmpeg_demuxer.cc
+@@ -966,24 +966,6 @@ void FFmpegDemuxer::OnFindStreamInfoDone(const PipelineStatusCB& status_cb,
+   // If no estimate is found, the stream entry will be kInfiniteDuration().
+   std::vector<base::TimeDelta> start_time_estimates(format_context->nb_streams,
+                                                     kInfiniteDuration());
+-  const AVFormatInternal* internal = format_context->internal;
+-  if (internal && internal->packet_buffer &&
+-      format_context->start_time != static_cast<int64>(AV_NOPTS_VALUE)) {
+-    struct AVPacketList* packet_buffer = internal->packet_buffer;
+-    while (packet_buffer != internal->packet_buffer_end) {
+-      DCHECK_LT(static_cast<size_t>(packet_buffer->pkt.stream_index),
+-                start_time_estimates.size());
+-      const AVStream* stream =
+-          format_context->streams[packet_buffer->pkt.stream_index];
+-      if (packet_buffer->pkt.pts != static_cast<int64>(AV_NOPTS_VALUE)) {
+-        const base::TimeDelta packet_pts =
+-            ConvertFromTimeBase(stream->time_base, packet_buffer->pkt.pts);
+-        if (packet_pts < start_time_estimates[stream->index])
+-          start_time_estimates[stream->index] = packet_pts;
+-      }
+-      packet_buffer = packet_buffer->next;
+-    }
+-  }
+ 
+   AVStream* audio_stream = NULL;
+   AudioDecoderConfig audio_config;
diff --git a/dev-util/electron/files/chromium-system-jinja-r7.patch b/dev-util/electron/files/chromium-system-jinja-r7.patch
new file mode 100644
index 000000000000..fe28e12c333c
--- /dev/null
+++ b/dev-util/electron/files/chromium-system-jinja-r7.patch
@@ -0,0 +1,35 @@
+--- third_party/WebKit/Source/bindings/scripts/scripts.gyp.orig	2014-08-19 09:55:10.330972228 +0000
++++ third_party/WebKit/Source/bindings/scripts/scripts.gyp	2014-08-19 09:55:26.387286232 +0000
+@@ -54,7 +54,6 @@
+     'actions': [{
+       'action_name': 'cache_jinja_templates',
+       'inputs': [
+-        '<@(jinja_module_files)',
+         'code_generator_v8.py',
+         '<@(code_generator_template_files)',
+       ],
+--- third_party/WebKit/Source/build/scripts/scripts.gypi.orig	2014-08-19 10:00:00.216521733 +0000
++++ third_party/WebKit/Source/build/scripts/scripts.gypi	2014-08-19 10:00:11.464735099 +0000
+@@ -2,10 +2,6 @@
+ {
+     'variables': {
+         'scripts_for_in_files': [
+-            # jinja2/__init__.py contains version string, so sufficient as
+-            # dependency for whole jinja2 package
+-            '<(DEPTH)/third_party/jinja2/__init__.py',
+-            '<(DEPTH)/third_party/markupsafe/__init__.py',  # jinja2 dep
+             'hasher.py',
+             'in_file.py',
+             'in_generator.py',
+--- third_party/WebKit/Source/bindings/scripts/scripts.gypi.orig	2014-08-19 10:53:02.824618979 +0000
++++ third_party/WebKit/Source/bindings/scripts/scripts.gypi	2014-08-19 10:53:20.784957370 +0000
+@@ -12,9 +12,6 @@
+       '<(DEPTH)/third_party/markupsafe/__init__.py',  # jinja2 dep
+     ],
+     'idl_lexer_parser_files': [
+-      # PLY (Python Lex-Yacc)
+-      '<(DEPTH)/third_party/ply/lex.py',
+-      '<(DEPTH)/third_party/ply/yacc.py',
+       # Web IDL lexer/parser (base parser)
+       '<(DEPTH)/tools/idl_parser/idl_lexer.py',
+       '<(DEPTH)/tools/idl_parser/idl_node.py',
diff --git a/dev-util/electron/files/chromium-system-libvpx-r0.patch b/dev-util/electron/files/chromium-system-libvpx-r0.patch
new file mode 100644
index 000000000000..cd7c164d7e6a
--- /dev/null
+++ b/dev-util/electron/files/chromium-system-libvpx-r0.patch
@@ -0,0 +1,20 @@
+--- build/linux/unbundle/libvpx.gyp.orig	2016-02-08 19:16:24.646981037 -0500
++++ build/linux/unbundle/libvpx.gyp	2016-02-08 19:15:42.449979462 -0500
+@@ -4,7 +4,7 @@
+ {
+   'targets': [
+     {
+-      'target_name': 'libvpx',
++      'target_name': 'libvpx_new',
+       'type': 'none',
+       'direct_dependent_settings': {
+         'cflags': [
+@@ -18,8 +18,6 @@
+           'vpx/vp8cx.h',
+           'vpx/vp8dx.h',
+           'vpx/vpx_codec.h',
+-          'vpx/vpx_codec_impl_bottom.h',
+-          'vpx/vpx_codec_impl_top.h',
+           'vpx/vpx_decoder.h',
+           'vpx/vpx_encoder.h',
+           'vpx/vpx_frame_buffer.h',
diff --git a/dev-util/electron/files/electron-gentoo-build-fixes.patch b/dev-util/electron/files/electron-gentoo-build-fixes.patch
new file mode 100644
index 000000000000..5a91a8f4a3e9
--- /dev/null
+++ b/dev-util/electron/files/electron-gentoo-build-fixes.patch
@@ -0,0 +1,157 @@
+From 174dd209209d8f67f534ad761d8adeeddc6bf5c0 Mon Sep 17 00:00:00 2001
+From: Elvis Pranskevichus <elvis@magic.io>
+Date: Mon, 8 Feb 2016 15:16:40 -0500
+Subject: [PATCH] electron build fixes
+
+---
+ atom.gyp       | 19 ++++++++-----------
+ common.gypi    | 32 +++++++++++++++++++++++---------
+ filenames.gypi |  1 -
+ 3 files changed, 31 insertions(+), 21 deletions(-)
+
+diff --git a/atom.gyp b/atom.gyp
+index 68a30cc..06109a9 100644
+--- a/atom.gyp
++++ b/atom.gyp
+@@ -177,7 +177,7 @@
+           ],
+         }, {
+           'dependencies': [
+-            'vendor/breakpad/breakpad.gyp:dump_syms#host',
++            'breakpad/breakpad.gyp:dump_syms#host',
+           ],
+         }],  # OS=="win"
+         ['OS=="linux"', {
+@@ -194,7 +194,7 @@
+                   }, {
+                     'copied_libraries': [
+                       '<(PRODUCT_DIR)/lib/libnode.so',
+-                      '<(libchromiumcontent_dir)/libffmpeg.so',
++                      '<(PRODUCT_DIR)/lib/libv8.so',
+                     ],
+                   }],
+                 ],
+@@ -202,9 +202,6 @@
+               'destination': '<(PRODUCT_DIR)',
+               'files': [
+                 '<@(copied_libraries)',
+-                '<(libchromiumcontent_dir)/locales',
+-                '<(libchromiumcontent_dir)/icudtl.dat',
+-                '<(libchromiumcontent_dir)/content_shell.pak',
+                 '<(libchromiumcontent_dir)/natives_blob.bin',
+                 '<(libchromiumcontent_dir)/snapshot_blob.bin',
+               ],
+@@ -242,8 +239,8 @@
+         '<@(lib_sources)',
+       ],
+       'include_dirs': [
+-        '.',
+         'chromium_src',
++        '.',
+         'vendor/brightray',
+         'vendor/native_mate',
+         # Include atom_natives.h.
+@@ -301,8 +298,8 @@
+             'vendor/node/deps/uv/uv.gyp:libuv',
+             'vendor/node/deps/zlib/zlib.gyp:zlib',
+             # Build with breakpad support.
+-            'vendor/breakpad/breakpad.gyp:breakpad_handler',
+-            'vendor/breakpad/breakpad.gyp:breakpad_sender',
++            'breakpad/breakpad.gyp:breakpad_handler',
++            'breakpad/breakpad.gyp:breakpad_sender',
+           ],
+         }],  # OS=="win"
+         ['OS=="mac" and mas_build==0', {
+@@ -333,7 +330,7 @@
+               # Make binary search for libraries under current directory, so we
+               # don't have to manually set $LD_LIBRARY_PATH:
+               # http://serverfault.com/questions/279068/cant-find-so-in-the-same-directory-as-the-executable
+-              '-rpath \$$ORIGIN',
++              '-Wl,-rpath=\$$ORIGIN/',
+               # Make native module dynamic loading work.
+               '-rdynamic',
+             ],
+@@ -344,10 +341,10 @@
+             '-Wno-reserved-user-defined-literal',
+           ],
+           'include_dirs': [
+-            'vendor/breakpad/src',
++            'breakpad/src',
+           ],
+           'dependencies': [
+-            'vendor/breakpad/breakpad.gyp:breakpad_client',
++            'breakpad/breakpad.gyp:breakpad_client',
+           ],
+         }],  # OS=="linux"
+       ],
+diff --git a/common.gypi b/common.gypi
+index 7c41c36..97a3d3a 100644
+--- a/common.gypi
++++ b/common.gypi
+@@ -17,28 +17,42 @@
+     'node_target_type': 'shared_library',
+     'node_install_npm': 'false',
+     'node_prefix': '',
+-    'node_shared_cares': 'false',
+-    'node_shared_http_parser': 'false',
+-    'node_shared_libuv': 'false',
+-    'node_shared_openssl': 'false',
+-    'node_shared_v8': 'true',
+-    'node_shared_zlib': 'false',
+     'node_tag': '',
+     'node_use_dtrace': 'false',
+     'node_use_etw': 'false',
+     'node_use_mdb': 'false',
+     'node_use_openssl': 'true',
+     'node_use_perfctr': 'false',
+-    'uv_library': 'static_library',
+-    'uv_parent_path': 'vendor/node/deps/uv',
+-    'uv_use_dtrace': 'false',
+     'V8_BASE': '',
+     'v8_postmortem_support': 'false',
+     'v8_enable_i18n_support': 'false',
++    'v8_gyp_path': '<(DEPTH)/v8/tools/gyp/v8.gyp',
++    'v8_libraries': '["v8", "v8_snapshot", "v8_nosnapshot", "v8_external_snapshot", "v8_base", "v8_libbase", "v8_libplatform"]',
++    'v8_target_type': 'shared_library',
++    'v8_use_snapshot': 'true',
++    'v8_use_external_startup_data': 1,
+   },
+   # Settings to compile node under Windows.
+   'target_defaults': {
+     'target_conditions': [
++      ['_target_name in <(v8_libraries) + ["node"]', {
++        'cflags!': [
++          '-fvisibility=hidden',
++          '-fdata-sections',
++          '-ffunction-sections',
++        ],
++        'cflags_cc!': [
++          '-fvisibility-inlines-hidden'
++        ],
++      }],
++
++      ['_target_name in <(v8_libraries) + ["mksnapshot"]', {
++        'defines': [
++          'V8_SHARED',
++          'BUILDING_V8_SHARED',
++        ],
++      }],
++
+       ['_target_name in ["libuv", "http_parser", "openssl", "cares", "node", "zlib"]', {
+         'msvs_disabled_warnings': [
+           4013,  # 'free' undefined; assuming extern returning int
+diff --git a/filenames.gypi b/filenames.gypi
+index abb1145..2330ccf 100644
+--- a/filenames.gypi
++++ b/filenames.gypi
+@@ -498,7 +498,6 @@
+       'chromium_src/extensions/browser/app_window/size_constraints.h',
+       'chromium_src/extensions/common/url_pattern.cc',
+       'chromium_src/extensions/common/url_pattern.h',
+-      'chromium_src/library_loaders/libspeechd_loader.cc',
+       'chromium_src/library_loaders/libspeechd.h',
+       'chromium_src/net/test/embedded_test_server/stream_listen_socket.cc',
+       'chromium_src/net/test/embedded_test_server/stream_listen_socket.h',
+-- 
+2.7.3
+
diff --git a/dev-util/electron/files/libchromiumcontent-gentoo-build-fixes.patch b/dev-util/electron/files/libchromiumcontent-gentoo-build-fixes.patch
new file mode 100644
index 000000000000..168d8db477a9
--- /dev/null
+++ b/dev-util/electron/files/libchromiumcontent-gentoo-build-fixes.patch
@@ -0,0 +1,75 @@
+From b7022129450eaf2136746f5332956e76848796ef Mon Sep 17 00:00:00 2001
+From: Elvis Pranskevichus <elvis@magic.io>
+Date: Mon, 8 Feb 2016 15:12:12 -0500
+Subject: [PATCH] libchromiumcontent build fixes
+
+---
+ chromiumcontent/chromiumcontent.gyp  |  6 +++---
+ chromiumcontent/chromiumcontent.gypi | 26 --------------------------
+ 2 files changed, 3 insertions(+), 29 deletions(-)
+
+diff --git a/chromiumcontent/chromiumcontent.gyp b/chromiumcontent/chromiumcontent.gyp
+index 52a1d36..db74a52 100644
+--- a/chromiumcontent/chromiumcontent.gyp
++++ b/chromiumcontent/chromiumcontent.gyp
+@@ -24,11 +24,11 @@
+     },
+     {
+       'target_name': 'chromiumcontent',
+-      # Build chromiumcontent as shared_library otherwise some static libraries
+-      # will not build.
+-      'type': 'shared_library',
++      'type': 'static_library',
+       'dependencies': [
+         '<(DEPTH)/base/base.gyp:base_prefs',
++        '<(DEPTH)/chrome/chrome_resources.gyp:packed_extra_resources',
++        '<(DEPTH)/chrome/chrome_resources.gyp:packed_resources',
+         '<(DEPTH)/components/components.gyp:cdm_renderer',
+         '<(DEPTH)/components/components.gyp:devtools_discovery',
+         '<(DEPTH)/components/components.gyp:devtools_http_handler',
+diff --git a/chromiumcontent/chromiumcontent.gypi b/chromiumcontent/chromiumcontent.gypi
+index 37c572b..3f4dcea 100644
+--- a/chromiumcontent/chromiumcontent.gypi
++++ b/chromiumcontent/chromiumcontent.gypi
+@@ -1,17 +1,5 @@
+ {
+   'variables': {
+-    # Enalbe using proprietary codecs.
+-    'proprietary_codecs': 1,
+-    'ffmpeg_branding': 'Chrome',
+-    # Enable support for Widevine CDM.
+-    'enable_widevine': 1,
+-    # Using libc++ requires building for >= 10.7.
+-    'mac_deployment_target': '10.8',
+-    # The 10.8 SDK does not work well with C++11.
+-    'mac_sdk_min': '10.9',
+-    # Use the standard way of linking with msvc runtime.
+-    'win_use_allocator_shim': 0,
+-    'win_release_RuntimeLibrary': '2',
+     # The V8 libraries.
+     'v8_libraries': '["v8", "v8_snapshot", "v8_nosnapshot", "v8_external_snapshot", "v8_base", "v8_libbase", "v8_libplatform"]',
+     # The icu libraries.
+@@ -22,20 +10,6 @@
+         'v8_use_external_startup_data': 1,
+       }],
+       ['OS=="linux"', {
+-        # Enable high DPI support on Linux.
+-        'enable_hidpi': 1,
+-        # Use Dbus.
+-        'use_dbus': 1,
+-        # Make Linux build contain debug symbols, this flag will add '-g' to
+-        # cflags.
+-        'linux_dump_symbols': 1,
+-        # The Linux build of libchromiumcontent.so depends on, but doesn't
+-        # provide, tcmalloc by default.  Disabling tcmalloc here also prevents
+-        # any conflicts when linking to binaries or libraries that don't use
+-        # tcmalloc.
+-        'linux_use_tcmalloc': 0,
+-        # Force using gold linker.
+-        'linux_use_bundled_gold': 1,
+         'conditions': [
+           ['target_arch=="arm"', {
+             'arm_version': 7,
+-- 
+2.4.10
+
diff --git a/dev-util/electron/files/node-gentoo-build-fixes.patch b/dev-util/electron/files/node-gentoo-build-fixes.patch
new file mode 100644
index 000000000000..b19cc3714b2e
--- /dev/null
+++ b/dev-util/electron/files/node-gentoo-build-fixes.patch
@@ -0,0 +1,50 @@
+From 668a003706d57c3e7a460e2fce5d110fe9737a62 Mon Sep 17 00:00:00 2001
+From: Elvis Pranskevichus <elvis@magic.io>
+Date: Wed, 10 Feb 2016 14:45:13 -0500
+Subject: [PATCH] Parametrize v8.gyp location
+
+---
+ node.gyp         | 5 +++--
+ tools/install.py | 3 +++
+ 2 files changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/node.gyp b/node.gyp
+index d431210..fea5e07 100644
+--- a/node.gyp
++++ b/node.gyp
+@@ -1,6 +1,7 @@
+ {
+   'variables': {
+     'v8_use_snapshot%': 'false',
++    'v8_gyp_path%': 'deps/v8/tools/gyp/v8.gyp',
+     'node_use_dtrace%': 'false',
+     'node_use_lttng%': 'false',
+     'node_use_etw%': 'false',
+@@ -89,8 +90,8 @@
+       'dependencies': [
+         'node_js2c#host',
+         'deps/cares/cares.gyp:cares',
+-        # 'deps/v8/tools/gyp/v8.gyp:v8',
+-        # 'deps/v8/tools/gyp/v8.gyp:v8_libplatform'
++        '<(v8_gyp_path):v8',
++        '<(v8_gyp_path):v8_libplatform'
+       ],
+ 
+       'include_dirs': [
+diff --git a/tools/install.py b/tools/install.py
+index cb86c65..ee85e33 100755
+--- a/tools/install.py
++++ b/tools/install.py
+@@ -207,6 +207,9 @@ def run(args):
+   if os.environ.get('HEADERS_ONLY'):
+     if cmd == 'install': return headers(install)
+     if cmd == 'uninstall': return headers(uninstall)
++  elif os.environ.get('NPM_ONLY'):
++    if cmd == 'install': return npm_files(install)
++    if cmd == 'uninstall': return npm_files(uninstall)
+   else:
+     if cmd == 'install': return files(install)
+     if cmd == 'uninstall': return files(uninstall)
+-- 
+2.7.3
+