Revert 111028 - Support W3C Full Screen API proposal

Source/WebKit/mac/WebView/WebView.mm

Index: Source/WebKit/mac/WebView/WebView.mm
===================================================================
--- Source/WebKit/mac/WebView/WebView.mm	(revision 113078)
+++ Source/WebKit/mac/WebView/WebView.mm	(working copy)
@@ -6284,9 +6284,14 @@
 #if ENABLE(FULLSCREEN_API)
 - (BOOL)_supportsFullScreenForElement:(const WebCore::Element*)element withKeyboard:(BOOL)withKeyboard
 {
+    if (withKeyboard)
+        return NO;
+
     if (![[WebPreferences standardPreferences] fullScreenEnabled])
         return NO;
 
+    // FIXME: If the element is in an IFrame, we should ensure it has 
+    // an AllowsFullScreen=YES attribute before allowing fullscreen access.
     return YES;
 }