Clear obsolete comment in GpuVideoDecoder.

media/filters/gpu_video_decoder.h

 // 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.
 
 #ifndef MEDIA_FILTERS_GPU_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_GPU_VIDEO_DECODER_H_
 
 #include <list>
 #include <map>
 #include <utility>
@@ skipping 85 matching lines @@
   virtual void NotifyFlushDone() OVERRIDE;
   virtual void NotifyResetDone() OVERRIDE;
   virtual void NotifyError(media::VideoDecodeAccelerator::Error error) OVERRIDE;
 
  protected:
   virtual ~GpuVideoDecoder();
 
  private:
   enum State {
     kNormal,
-    // Avoid the use of "flush" in these enums because the term is overloaded:
-    // Filter::Flush() means drop pending data on the floor, but
-    // VideoDecodeAccelerator::Flush() means drain pending data (Filter::Flush()
-    // actually corresponds to VideoDecodeAccelerator::Reset(), confusingly
-    // enough).

[xhwang, 2013/04/18 03:18:36]

VideoDecoder::Flush() was replaced by Reset() so we don't have confusion here.
But DrainingDecoder still seems a better name here.

     kDrainingDecoder,
     kDecoderDrained,
   };
 
   // If no demuxer read is in flight and no bitstream buffers are in the
   // decoder, kick some off demuxing/decoding.
   void EnsureDemuxOrDecode();
 
   // Return true if more decode work can be piled on to the VDA.
   bool CanMoreDecodeWorkBeDone();
 
   // Callback to pass to demuxer_stream_->Read() for receiving encoded bits.
   void RequestBufferDecode(DemuxerStream::Status status,
                            const scoped_refptr<DecoderBuffer>& buffer);
 
   // Enqueue a frame for later delivery (or drop it on the floor if a
   // vda->Reset() is in progress) and trigger out-of-line delivery of the oldest
   // ready frame to the client if there is a pending read.  A NULL |frame|
   // merely triggers delivery, and requires the ready_video_frames_ queue not be
   // empty.
   void EnqueueFrameAndTriggerFrameDelivery(
       const scoped_refptr<VideoFrame>& frame);
 
-  // Indicate the picturebuffer can be reused by the decoder.
+  // Indicate the picture buffer can be reused by the decoder.
   void ReusePictureBuffer(int64 picture_buffer_id);
 
   void RecordBufferData(
       const BitstreamBuffer& bitstream_buffer, const DecoderBuffer& buffer);
   void GetBufferData(int32 id, base::TimeDelta* timetamp,
                      gfx::Rect* visible_rect, gfx::Size* natural_size);
 
   // Set |vda_| and |weak_vda_| on the VDA thread (in practice the render
   // thread).
   void SetVDA(VideoDecodeAccelerator* vda);
@@ skipping 92 matching lines @@
   // Set during ProvidePictureBuffers(), used for checking and implementing
   // HasAvailableOutputFrames().
   int available_pictures_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_GPU_VIDEO_DECODER_H_