use_system_ffmpeg broken in gentoo.

media/media.gyp

 # Copyright (c) 2010 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,
     'player_x11_renderer%': 'x11',
   },
   'targets': [
@@ skipping 96 matching lines @@
         'filters/bitstream_converter.h',
         'filters/decoder_base.h',
         'filters/ffmpeg_audio_decoder.cc',
         'filters/ffmpeg_audio_decoder.h',
         'filters/ffmpeg_demuxer.cc',
         'filters/ffmpeg_demuxer.h',
         'filters/ffmpeg_glue.cc',
         'filters/ffmpeg_glue.h',
         'filters/ffmpeg_interfaces.cc',
         'filters/ffmpeg_interfaces.h',
-        'filters/ffmpeg_video_allocator.cc',
-        'filters/ffmpeg_video_allocator.h',
         'filters/ffmpeg_video_decode_engine.cc',
         'filters/ffmpeg_video_decode_engine.h',
         'filters/ffmpeg_video_decoder.cc',
         'filters/ffmpeg_video_decoder.h',
         'filters/file_data_source.cc',
         'filters/file_data_source.h',
         'filters/null_audio_renderer.cc',
         'filters/null_audio_renderer.h',
         'filters/video_decode_engine.h',
         'filters/video_renderer_base.cc',
@@ skipping 378 matching lines @@
       ],
     }],
   ],
 }
 
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