Add use_v4l2_codec use flag to include v4l2 codec on x86 CrOS.

media/media_options.gni

 # Copyright 2014 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.
 
 declare_args() {
   # Allows distributions to link pulseaudio directly (DT_NEEDED) instead of
   # using dlopen. This helps with automated detection of ABI mismatches and
   # prevents silent errors.
   link_pulseaudio = false
 
@@ skipping 33 matching lines @@
   # Enables the MPEG2-TS stream parser for use with Media Source. Disabled by
   # default since it's not available on the normal Web Platform and costs money.
   enable_mpeg2ts_stream_parser = false
 
   # Enables browser side Content Decryption Modules. Required for android where
   # the typical PPAPI based CDM is not available.
   enable_browser_cdms = is_android
 
   # TODO(GYP): This should be a platform define.
   is_openbsd = false
+

[wuchengli, 2015/01/08 11:16:46]

Add a TODO to remove this after the linux header of trybot is updated.

[henryhsu, 2015/01/08 12:11:19]

Done.

+  # Indicates if Video4Linux2 codec is used. This is used for x86 CrOS
+  # platform which has v4l2 hardware encoder / decoder.
+  use_v4l2_codec = false

[wuchengli, 2015/01/08 11:16:46]

Shouldn't this go to content/common/common.gni? No media gn uses this.

[henryhsu, 2015/01/08 12:11:19]

Done.

 }