[cros] Implement WebM encoder/muxer for animated avatar capture.

media/media.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the PulseAudio library.
     'use_pulseaudio%': 0,
     # Override to dynamically link the cras (ChromeOS audio) library.
@@ skipping 334 matching lines @@
           ],
           'sources':[
             'audio/android/audio_track_output_stub_android.cc',
           ],
           'link_settings': {
             'libraries': [
               '-lOpenSLES',
             ],
           },
         }],
+        # A simple WebM encoder for animated avatars on ChromeOS.
+        ['chromeos==1', {
+          'dependencies': [
+            '../skia/skia.gyp:skia',
+            '../third_party/libvpx/libvpx.gyp:libvpx',
+            '../third_party/libyuv/libyuv.gyp:libyuv',
+          ],
+          'sources': [
+            'webm/chromeos/ebml_writer.cc',
+            'webm/chromeos/ebml_writer.h',
+            'webm/chromeos/webm_encoder.cc',
+            'webm/chromeos/webm_encoder.h',
+          ],
+        }],
         ['OS=="linux" or OS=="freebsd" or OS=="solaris"', {
           'link_settings': {
             'libraries': [
               '-lasound',
             ],
           },
         }],
         ['OS=="openbsd"', {
           'sources/': [ ['exclude', '/alsa_' ],
                         ['exclude', '/audio_manager_linux' ] ],
@@ skipping 771 matching lines @@
             '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }