Enable H.264 video WebRTC behind run-time flag and add WebRtcBrowserTest for H.264

content/content_common.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../cc/cc.gyp:cc',
     '../components/tracing.gyp:tracing',
     '../device/bluetooth/bluetooth.gyp:device_bluetooth',
@@ skipping 780 matching lines @@
       ],
       'sources': [
         'common/gpu/media/android_video_encode_accelerator.cc',
         'common/gpu/media/android_video_encode_accelerator.h',
       ],
     }],
     ['enable_webrtc==1', {
       'dependencies': [
         '../third_party/libjingle/libjingle.gyp:libjingle',
       ],
+      'includes': [
+        '../third_party/webrtc/build/common.gypi',
+      ],
+      'conditions': [
+        ['rtc_use_h264==1', {
+          'defines': [
+            'BUILDFLAG_RTC_USE_H264',
+          ],
+        }],
+      ],
       'sources': [
         'public/common/webrtc_ip_handling_policy.cc',
         'public/common/webrtc_ip_handling_policy.h',
       ],
     }],
     ['use_v4lplugin==1 and chromeos==1', {
       'defines': [
         'USE_LIBV4L2'
       ],
       'variables': {
@@ skipping 274 matching lines @@
         'common/gpu/client/gpu_memory_buffer_impl_ozone.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc',
         'common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.h',
         'common/gpu/gpu_memory_buffer_factory_ozone.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     }],
   ],
 }