Improve logging output for DecoderBuffer and VideoFrame

media/base/video_frame.h

Index: media/base/video_frame.h
diff --git a/media/base/video_frame.h b/media/base/video_frame.h
index edd9dd5559b5c0bb0ceed9f414cd1a5b6ec6bc1c..ad7f4c01a4268651728ce71acba87c3ec0ac388e 100644
--- a/media/base/video_frame.h
+++ b/media/base/video_frame.h
@@ -8,6 +8,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <string>
 #include <vector>
 
 #include "base/callback.h"
@@ -409,6 +410,9 @@ class MEDIA_EXPORT VideoFrame : public base::RefCountedThreadSafe<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>;