Support subtitles for native fullscreen video

Source/core/platform/graphics/MediaPlayer.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 141 matching lines @@
     virtual bool didLoadingProgress() const = 0;
 
     virtual void paint(GraphicsContext*, const IntRect&) = 0;
 
     virtual void paintCurrentFrameInContext(GraphicsContext*, const IntRect&) = 0;
     virtual bool copyVideoTextureToPlatformTexture(GraphicsContext3D*, Platform3DObject, GC3Dint, GC3Denum, GC3Denum, bool, bool) = 0;
 
     enum Preload { None, MetaData, Auto };
     virtual void setPreload(Preload) = 0;
 
-#if USE(NATIVE_FULLSCREEN_VIDEO)
-    virtual void enterFullscreen() = 0;
-    virtual void exitFullscreen() = 0;
-    virtual bool canEnterFullscreen() const = 0;
-#endif
+    virtual void showFullscreenOverlay() = 0;
+    virtual void hideFullscreenOverlay() = 0;
+    virtual bool canShowFullscreenOverlay() const = 0;
 
     // whether accelerated rendering is supported by the media engine for the current media.
     virtual bool supportsAcceleratedRendering() const = 0;
 
     virtual bool hasSingleSecurityOrigin() const = 0;
 
     virtual bool didPassCORSAccessCheck() const = 0;
 
     // Time value in the movie's time scale. It is only necessary to override this if the media
     // engine uses rational numbers to represent media time.
@@ skipping 10 matching lines @@
 
     enum MediaKeyException { NoError, InvalidPlayerState, KeySystemNotSupported };
     virtual MediaKeyException addKey(const String&, const unsigned char*, unsigned, const unsigned char*, unsigned, const String&) = 0;
     virtual MediaKeyException generateKeyRequest(const String&, const unsigned char*, unsigned) = 0;
     virtual MediaKeyException cancelKeyRequest(const String&, const String&) = 0;
 };
 
 }
 
 #endif // MediaPlayer_h