fix canplaythrough

media/blink/webmediaplayer_impl.h

Index: media/blink/webmediaplayer_impl.h
diff --git a/media/blink/webmediaplayer_impl.h b/media/blink/webmediaplayer_impl.h
index 6a2e54193abe9f598653bde34e4bcb57c0be391c..fa0a9d9c1b05b2462732c7ab4cc645af168d6883 100644
--- a/media/blink/webmediaplayer_impl.h
+++ b/media/blink/webmediaplayer_impl.h
@@ -457,6 +457,14 @@ class MEDIA_BLINK_EXPORT WebMediaPlayerImpl
   // handling a src= or MSE based playback.
   void RecordUnderflowDuration(base::TimeDelta duration);
 
+  // Called by the data source when loading progresses.
+  // Can be called quite often.
+  void OnProgress();
+
+  // Returns true when we estimate that we can play the rest of the media
+  // without buffering.
+  bool CanPlayThrough();
+
   // Records |natural_size| to MediaLog and video height to UMA.
   void RecordVideoNaturalSize(const gfx::Size& natural_size);