Replace RenderFullScreen with top layer

Source/core/dom/FullscreenElementStack.h

Index: Source/core/dom/FullscreenElementStack.h
diff --git a/Source/core/dom/FullscreenElementStack.h b/Source/core/dom/FullscreenElementStack.h
index 346ea1e520a3c31a42e1ab0c626ee7835f1510a9..41d493adcf92daf960de6cb431687d1866324c59 100644
--- a/Source/core/dom/FullscreenElementStack.h
+++ b/Source/core/dom/FullscreenElementStack.h
@@ -42,7 +42,6 @@ namespace WebCore {
 class Document;
 class Element;
 class Node;
-class RenderFullScreen;
 class RenderStyle;
 class ExecutionContext;
 
@@ -72,10 +71,6 @@ public:
     void webkitWillExitFullScreenForElement(Element*);
     void webkitDidExitFullScreenForElement(Element*);
 
-    void setFullScreenRenderer(RenderFullScreen*);
-    RenderFullScreen* fullScreenRenderer() const { return m_fullScreenRenderer; }
-    void fullScreenRendererDestroyed();
-
     void clearFullscreenElementStack();
     void popFullscreenElementStack();
     void pushFullscreenElementStack(Element*);
@@ -108,7 +103,6 @@ private:
     bool m_areKeysEnabledInFullScreen;
     RefPtr<Element> m_fullScreenElement;
     Vector<RefPtr<Element> > m_fullScreenElementStack;
-    RenderFullScreen* m_fullScreenRenderer;
     Timer<FullscreenElementStack> m_fullScreenChangeDelayTimer;
     Deque<RefPtr<Node> > m_fullScreenChangeEventTargetQueue;
     Deque<RefPtr<Node> > m_fullScreenErrorEventTargetQueue;