WebRTC: Enable OpenH264 for WebRTC standalone bots.

scripts/slave/recipe_modules/webrtc/chromium_config.py

Index: scripts/slave/recipe_modules/webrtc/chromium_config.py
diff --git a/scripts/slave/recipe_modules/webrtc/chromium_config.py b/scripts/slave/recipe_modules/webrtc/chromium_config.py
index 14aad8f2c174f1a1c4487fdd60eb543d6625a1ec..47b7e10797ed5e9a6a804d8a750f325c1ad89b65 100644
--- a/scripts/slave/recipe_modules/webrtc/chromium_config.py
+++ b/scripts/slave/recipe_modules/webrtc/chromium_config.py
@@ -12,7 +12,7 @@ CONFIG_CTX = DEPS['chromium'].CONFIG_CTX
 SUPPORTED_TARGET_ARCHS = ('intel', 'arm')
 
 
-@CONFIG_CTX(includes=['chromium', 'dcheck'])
+@CONFIG_CTX(includes=['chromium', 'dcheck', 'webrtc_openh264'])
 def webrtc_standalone(c):
   _compiler_defaults(c)
 
@@ -25,7 +25,7 @@ def webrtc_standalone(c):
 def webrtc_gcc(c):
   _compiler_defaults(c)
 
-@CONFIG_CTX(includes=['chromium_clang', 'dcheck'])
+@CONFIG_CTX(includes=['chromium_clang', 'dcheck', 'webrtc_openh264'])
 def webrtc_clang(c):
   _compiler_defaults(c)
 
@@ -50,11 +50,27 @@ def webrtc_ios(c):
 @CONFIG_CTX(includes=['gn'])
 def webrtc_gn(c):
   c.compile_py.default_targets = ['all']
+  if c.TARGET_PLATFORM != 'ios' and c.TARGET_PLATFORM != 'android':
+    c.gn_args = [
+      'ffmpeg_branding="Chrome"',
+      'rtc_use_h264=true',
+    ]
 
-@CONFIG_CTX(includes=['gn'])
+@CONFIG_CTX(includes=['webrtc_gn'])
 def webrtc_libfuzzer(c):
-  c.gn_args = ['use_libfuzzer=true',
-               'is_asan=true']
+  c.gn_args.extend([
+    'use_libfuzzer=true',
+    'is_asan=true',
+  ])
+
+@CONFIG_CTX()
+def webrtc_openh264(c):
+  if c.TARGET_PLATFORM == 'ios':
+    raise BadConf('ffmpeg decode not supported for iOS')  # pragma: no cover
+  if c.TARGET_PLATFORM == 'android':
+    raise BadConf('h264 decode not supported for Android')  # pragma: no cover
+  c.gyp_env.GYP_DEFINES['ffmpeg_branding'] = 'Chrome'
+  c.gyp_env.GYP_DEFINES['rtc_use_264'] = 1
 
 def _compiler_defaults(c):
   c.compile_py.default_targets = ['All']