Restore the HTMLVideoElement-specific prefixed fullscreen API behind a flag

Source/core/html/HTMLVideoElement.h

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 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 27 matching lines @@
 class ExceptionState;
 class HTMLImageLoader;
 
 class HTMLVideoElement FINAL : public HTMLMediaElement, public CanvasImageSource {
 public:
     static PassRefPtr<HTMLVideoElement> create(Document&);
 
     unsigned videoWidth() const;
     unsigned videoHeight() const;
 
+    // Fullscreen
+    void webkitEnterFullscreen(ExceptionState&);

[eseidel, 2014/03/27 16:54:18]

Are these different from their non-prefix'd counterparts such that they need a
webkit name?

[philipj_slow, 2014/03/27 18:58:31]

These don't have unprefixed counterparts and never will, since what ended up in
http://fullscreen.spec.whatwg.org/ is Element.requestFullscreen() and
Document.exitFullscreen().

+    void webkitExitFullscreen();
+    bool webkitSupportsFullscreen();
+    bool webkitDisplayingFullscreen();
+
     // Statistics
     unsigned webkitDecodedFrameCount() const;
     unsigned webkitDroppedFrameCount() const;
 
     // Used by canvas to gain raw pixel access
     void paintCurrentFrameInContext(GraphicsContext*, const IntRect&) const;
 
     // Used by WebGL to do GPU-GPU textures copy if possible.
     // See more details at MediaPlayer::copyVideoTextureToPlatformTexture() defined in Source/WebCore/platform/graphics/MediaPlayer.h.
     bool copyVideoTextureToPlatformTexture(blink::WebGraphicsContext3D*, Platform3DObject texture, GC3Dint level, GC3Denum type, GC3Denum internalFormat, bool premultiplyAlpha, bool flipY);
@@ skipping 14 matching lines @@
 private:
     HTMLVideoElement(Document&);
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
     virtual bool hasVideo() const OVERRIDE { return player() && player()->hasVideo(); }
+    bool supportsFullscreen() const;
     virtual bool isURLAttribute(const Attribute&) const OVERRIDE;
     virtual const AtomicString imageSourceURL() const OVERRIDE;
 
     bool hasAvailableVideoFrame() const;
     virtual void updateDisplayState() OVERRIDE;
     virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
     virtual void setDisplayMode(DisplayMode) OVERRIDE;
 
     OwnPtr<HTMLImageLoader> m_imageLoader;
 
     AtomicString m_defaultPosterURL;
 };
 
 } //namespace
 
 #endif