Add metadata to media::VideoFrame and plumb it through IPC/MediaStream.

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 cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 370 matching lines @@
         'base/video_capture_types.cc',
         'base/video_capture_types.h',
         'base/video_capturer_source.cc',
         'base/video_capturer_source.h',
         'base/video_decoder.cc',
         'base/video_decoder.h',
         'base/video_decoder_config.cc',
         'base/video_decoder_config.h',
         'base/video_frame.cc',
         'base/video_frame.h',
+        'base/video_frame_metadata.cc',
+        'base/video_frame_metadata.h',
         'base/video_frame_pool.cc',
         'base/video_frame_pool.h',
         'base/video_renderer.cc',
         'base/video_renderer.h',
         'base/video_rotation.h',
         'base/video_util.cc',
         'base/video_util.h',
         'base/wall_clock_time_source.cc',
         'base/wall_clock_time_source.h',
         'base/yuv_convert.cc',
@@ skipping 1481 matching lines @@
           'sources': [
             'base/mac/coremedia_glue.h',
             'base/mac/coremedia_glue.mm',
             'base/mac/corevideo_glue.h',
             'base/mac/video_frame_mac.cc',
             'base/mac/video_frame_mac.h',
             'base/mac/videotoolbox_glue.h',
             'base/mac/videotoolbox_glue.mm',
             'base/video_frame.cc',
             'base/video_frame.h',
+            'base/video_frame_metadata.cc',
+            'base/video_frame_metadata.h',
           ],
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/CoreVideo.framework',
             ],
           },
           'conditions': [
             ['arm_neon==1', {
               'defines': [
                 'USE_NEON'
@@ skipping 30 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'media_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }