Improve logging output for DecoderBuffer and VideoFrame

media/base/video_frame.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_FRAME_H_
 #define MEDIA_BASE_VIDEO_FRAME_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
+#include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/md5.h"
 #include "base/memory/shared_memory.h"
 #include "base/synchronization/lock.h"
 #include "build/build_config.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
 #include "media/base/video_frame_metadata.h"
@@ skipping 381 matching lines @@
   void set_timestamp(base::TimeDelta timestamp) {
     timestamp_ = timestamp;
   }
 
   // It uses |client| to insert a new sync point and potentially waits on a
   // older sync point. The final sync point will be used to release this
   // VideoFrame.
   // This method is thread safe. Both blink and compositor threads can call it.
   void UpdateReleaseSyncToken(SyncTokenClient* client);
 
+  // Returns a human-readable string describing |*this|.
+  std::string AsHumanReadableString();
+
  private:
   friend class base::RefCountedThreadSafe<VideoFrame>;
 
   static scoped_refptr<VideoFrame> WrapExternalStorage(
       VideoPixelFormat format,
       StorageType storage_type,
       const gfx::Size& coded_size,
       const gfx::Rect& visible_rect,
       const gfx::Size& natural_size,
       uint8_t* data,
@@ skipping 99 matching lines @@
   gpu::SyncToken release_sync_token_;
 
   VideoFrameMetadata metadata_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(VideoFrame);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_VIDEO_FRAME_H_