SeekableBuffer to implement a window of buffer which has short seeking ability.

media/media.gyp

 # Copyright (c) 2009 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,
   },
   'includes': [
     '../build/common.gypi',
@@ skipping 42 matching lines @@
         'base/media_win.cc',
         'base/media.h',
         'base/media_format.cc',
         'base/media_format.h',
         'base/mock_filter_host.h',
         'base/mock_media_filters.h',
         'base/mock_pipeline.h',
         'base/pipeline.h',
         'base/pipeline_impl.cc',
         'base/pipeline_impl.h',
+        'base/seekable_buffer.cc',
+        'base/seekable_buffer.h',
         'base/synchronizer.cc',
         'base/synchronizer.h',
         'base/video_frame_impl.cc',
         'base/video_frame_impl.h',
         'base/yuv_convert.cc',
         'base/yuv_convert.h',
         'base/yuv_row_win.cc',
         'base/yuv_row_mac.cc',
         'base/yuv_row_linux.cc',
         'base/yuv_row.h',
@@ skipping 58 matching lines @@
         '../base/base.gyp:base',
         '../testing/gtest.gyp:gtest',
         '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
       ],
       'sources': [
         'audio/win/audio_output_win_unittest.cc',
         'audio/mac/audio_output_mac_unittest.cc',
         'base/data_buffer_unittest.cc',
         'base/pipeline_impl_unittest.cc',
         'base/run_all_unittests.cc',
+        'base/seekable_buffer_unittest.cc',
         'base/video_frame_impl_unittest.cc',
         'base/yuv_convert_unittest.cc',
         'filters/ffmpeg_demuxer_unittest.cc',
         'filters/ffmpeg_glue_unittest.cc',
         'filters/file_data_source_unittest.cc',
         'filters/video_decoder_unittest.cc',
         'filters/video_renderer_unittest.cc',
       ],
       'conditions': [
         ['OS=="linux"', {
@@ skipping 62 matching lines @@
             'player/stdafx.h',
             'player/view.h',
             'player/wtl_renderer.cc',
             'player/wtl_renderer.h',
           ],
         },
       ],
     }],
   ],
 }