Create video and audio decoder threads on demand.

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,
   },
@@ skipping 578 matching lines @@
         'audio/win/audio_low_latency_input_win_unittest.cc',
         'audio/win/audio_low_latency_output_win_unittest.cc',
         'audio/win/audio_output_win_unittest.cc',
         'base/clock_unittest.cc',
         'base/composite_filter_unittest.cc',
         'base/data_buffer_unittest.cc',
         'base/djb2_unittest.cc',
         'base/download_rate_monitor_unittest.cc',
         'base/filter_collection_unittest.cc',
         'base/h264_bitstream_converter_unittest.cc',
+        'base/message_loop_factory_for_test.cc',
+        'base/message_loop_factory_for_test.h',
         'base/mock_reader.h',
         'base/pipeline_unittest.cc',
         'base/run_all_unittests.cc',
         'base/seekable_buffer_unittest.cc',
         'base/state_matrix_unittest.cc',
         'base/test_data_util.cc',
         'base/test_data_util.h',
         'base/video_frame_unittest.cc',
         'base/video_util_unittest.cc',
         'base/yuv_convert_unittest.cc',
@@ skipping 338 matching lines @@
             '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }