MediaLog: Log selected audio/video decoder name.

media/base/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_BASE_VIDEO_DECODER_H_
 #define MEDIA_BASE_VIDEO_DECODER_H_
 
+#include <string>
+
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/media_export.h"
 #include "media/base/pipeline_status.h"
 #include "ui/gfx/size.h"
 
 namespace media {
 
 class DecoderBuffer;
 class VideoDecoderConfig;
@@ skipping 21 matching lines @@
   typedef base::Callback<void(Status status)> DecodeCB;
 
   VideoDecoder();
 
   // Fires any pending callbacks, stops and destroys the decoder.
   // Note: Since this is a destructor, |this| will be destroyed after this call.
   // Make sure the callbacks fired from this call doesn't post any task that
   // depends on |this|.
   virtual ~VideoDecoder();
 
+  // Returns the name of the decoder for logging purpose.
+  virtual std::string GetDisplayName() const = 0;
+
   // Initializes a VideoDecoder with the given |config|, executing the
   // |status_cb| upon completion. |output_cb| is called for each output frame
   // decoded by Decode().
   //
   // Note:
   // 1) The VideoDecoder will be reinitialized if it was initialized before.
   //    Upon reinitialization, all internal buffered frames will be dropped.
   // 2) This method should not be called during pending decode or reset.
   // 3) No VideoDecoder calls should be made before |status_cb| is executed.
   virtual void Initialize(const VideoDecoderConfig& config,
@@ skipping 41 matching lines @@
   // Returns maximum number of parallel decode requests.
   virtual int GetMaxDecodeRequests() const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_DECODER_H_