Reland r212023 "Rename VideoDecoder::ReadCB to VideoDecoder::DecodeCB."

media/base/video_decoder.h

Index: media/base/video_decoder.h
diff --git a/media/base/video_decoder.h b/media/base/video_decoder.h
index d10dd2fed103205a67f1b7bc15b8645c96d864cf..63f63e5d7d6d9b70dc9f84c98fb159b2e7653df5 100644
--- a/media/base/video_decoder.h
+++ b/media/base/video_decoder.h
@@ -55,13 +55,12 @@ class MEDIA_EXPORT VideoDecoder {
   // - NULL frame indicates an aborted decode. This can happen if Reset() or
   //   Stop() is called during the decoding process.
   // Otherwise the returned frame must be NULL.
-  //
-  // TODO(xhwang): Rename this to DecodeCB.
-  typedef base::Callback<void(Status, const scoped_refptr<VideoFrame>&)> ReadCB;
+  typedef base::Callback<void(Status,
+                              const scoped_refptr<VideoFrame>&)> DecodeCB;
   virtual void Decode(const scoped_refptr<DecoderBuffer>& buffer,
-                      const ReadCB& read_cb) = 0;
+                      const DecodeCB& decode_cb) = 0;
 
-  // Resets decoder state, fulfilling all pending ReadCB and dropping extra
+  // Resets decoder state, fulfilling all pending DecodeCB and dropping extra
   // queued decoded data. After this call, the decoder is back to an initialized
   // clean state.
   // Note: No VideoDecoder calls should be made before |closure| is executed.