Remove scaffolding for WebKit-proprietary fullscreen API

Source/core/page/ChromeClient.h

Index: Source/core/page/ChromeClient.h
diff --git a/Source/core/page/ChromeClient.h b/Source/core/page/ChromeClient.h
index 71a2dbe10d6ac10e3454f24b34df009903030f93..4f681925d12d845d2eb31a53fe693899b4289d82 100644
--- a/Source/core/page/ChromeClient.h
+++ b/Source/core/page/ChromeClient.h
@@ -249,9 +249,6 @@ public:
     // Returns a bitfield indicating conditions that can trigger the compositor.
     virtual CompositingTriggerFlags allowedCompositingTriggers() const { return static_cast<CompositingTriggerFlags>(AllTriggers); }
 
-    virtual void enterFullscreenForNode(Node*) { }
-    virtual void exitFullscreenForNode(Node*) { }
-
     virtual void enterFullScreenForElement(Element*) { }
     virtual void exitFullScreenForElement(Element*) { }
     virtual void setRootFullScreenLayer(GraphicsLayer*) { }