Reduce header dependencies in base/

media/filters/video_thread.h

 // 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.
 
 // An alternative to VideoRendererBase, VideoThread creates its own thread for
 // the sole purpose of timing frame presentation.  It handles reading from the
 // decoder and stores the results in a queue of decoded frames, calling
 // OnFrameAvailable() on subclasses to notify when a frame is ready to display.
 //
 // The media filter methods Initialize(), Stop(), SetPlaybackRate() and Seek()
 // should be serialized, which they commonly are the pipeline thread.
 // As long as VideoThread is initialized, GetCurrentFrame() is safe to call from
 // any thread, at any time, including inside of OnFrameAvailable().
 
 #ifndef MEDIA_FILTERS_VIDEO_THREAD_H_
 #define MEDIA_FILTERS_VIDEO_THREAD_H_
 
 #include <deque>
 
 #include "base/condition_variable.h"
+#include "base/lock.h"
 #include "media/base/filters.h"
 
 namespace media {
 
 // TODO(scherkus): to avoid subclasses, consider using a peer/delegate interface
 // and pass in a reference to the constructor.
 class VideoThread : public VideoRenderer,
                     public PlatformThread::Delegate {
  public:
   VideoThread();
@@ skipping 77 matching lines @@
   base::TimeDelta previous_time_;
 
   float playback_rate_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoThread);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_VIDEO_THREAD_H_