Hide knowledge of webkit::ppapi::PluginDelegate from chrome. This is part of moving ppapi implement…

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
===================================================================
--- content/public/browser/web_contents_delegate.h	(revision 212906)
+++ content/public/browser/web_contents_delegate.h	(working copy)
@@ -305,10 +305,6 @@
                                   const GURL& target_url,
                                   WebContents* new_contents) {}
 
-  // Notifies the delegate that the content restrictions for this tab has
-  // changed.
-  virtual void ContentRestrictionsChanged(WebContents* source) {}
-
   // Notification that the tab is hung.
   virtual void RendererUnresponsive(WebContents* source) {}