[Media Controls] Prevent flicker when enter/exit fullscreen

third_party/WebKit/Source/core/html/media/MediaControls.h

Index: third_party/WebKit/Source/core/html/media/MediaControls.h
diff --git a/third_party/WebKit/Source/core/html/media/MediaControls.h b/third_party/WebKit/Source/core/html/media/MediaControls.h
index e86fd0ae2c238d14648cf805a91b62885af8f676..b2b00dbbd71ea136c4262275bc9f1b4023c37d0b 100644
--- a/third_party/WebKit/Source/core/html/media/MediaControls.h
+++ b/third_party/WebKit/Source/core/html/media/MediaControls.h
@@ -35,8 +35,11 @@ class CORE_EXPORT MediaControls : public GarbageCollectedMixin {
 
   HTMLMediaElement& MediaElement() const;
 
-  virtual void Show() = 0;
+  // Enables showing of the controls - only shows if appropriate.
+  virtual void MaybeShow() = 0;
+  // Disables showing of the controls - immediately hides.
   virtual void Hide() = 0;
+
   virtual void Reset() = 0;
 
   // Notify the media controls that the controlsList attribute has changed.