Revert 177842. This doesn't build in standalone webkit builds:

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.
     'use_cras%': 0,
     'conditions': [
       ['OS == "android" or OS == "ios"', {
         # Android and iOS don't use ffmpeg.
         'use_ffmpeg%': 0,
-        # Android and iOS don't use libvpx.
-        'use_libvpx%': 0,
       }, {  # 'OS != "android" and OS != "ios"'
         'use_ffmpeg%': 1,
-        'use_libvpx%': 1,
       }],
     ],
   },
   'targets': [
     {
       'target_name': 'media',
       'type': '<(component)',
       'dependencies': [
         '../base/base.gyp:base',
         '../build/temp_gyp/googleurl.gyp:googleurl',
@@ skipping 278 matching lines @@
         'filters/skcanvas_video_renderer.cc',
         'filters/skcanvas_video_renderer.h',
         'filters/source_buffer_stream.cc',
         'filters/source_buffer_stream.h',
         'filters/video_decoder_selector.cc',
         'filters/video_decoder_selector.h',
         'filters/video_frame_generator.cc',
         'filters/video_frame_generator.h',
         'filters/video_renderer_base.cc',
         'filters/video_renderer_base.h',
-        'filters/vpx_video_decoder.cc',
-        'filters/vpx_video_decoder.h',
         'video/capture/fake_video_capture_device.cc',
         'video/capture/fake_video_capture_device.h',
         'video/capture/linux/video_capture_device_linux.cc',
         'video/capture/linux/video_capture_device_linux.h',
         'video/capture/mac/video_capture_device_mac.h',
         'video/capture/mac/video_capture_device_mac.mm',
         'video/capture/mac/video_capture_device_qtkit_mac.h',
         'video/capture/mac/video_capture_device_qtkit_mac.mm',
         'video/capture/video_capture.h',
         'video/capture/video_capture_device.h',
@@ skipping 80 matching lines @@
             'filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc',
             'filters/ffmpeg_h264_to_annex_b_bitstream_converter.h',
             'filters/ffmpeg_video_decoder.cc',
             'filters/ffmpeg_video_decoder.h',
             'webm/webm_cluster_parser.cc',
             'webm/webm_cluster_parser.h',
             'webm/webm_stream_parser.cc',
             'webm/webm_stream_parser.h',
           ],
         }],
-        ['use_libvpx == 1', {
-          'dependencies': [
-            '<(DEPTH)/third_party/libvpx/libvpx.gyp:libvpx',
-          ],
-        }, {  # use_libvpx == 0
-          # Exclude the sources that depend on libvpx.
-          'sources!': [
-            'filters/vpx_video_decoder.cc',
-            'filters/vpx_video_decoder.h',
-          ],
-        }],
         ['OS == "ios"', {
           'includes': [
             # For shared_memory_support_sources variable.
             'shared_memory_support.gypi',
           ],
           'sources': [
             'base/media_stub.cc',
             # These sources are normally built via a dependency on the
             # shared_memory_support target, but that target is not built on iOS.
             # Instead, directly build only the files that are needed for iOS.
@@ skipping 940 matching lines @@
             'media',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }