Bug #14928 --> phase one of uri dispatching landing. add ability to get/set content listener parent on the webshell

r=travis

webshell/public/nsIWebShell.h

@@ -43,6 +43,7 @@ class nsIWebShell;
 class nsIWebShellContainer;
 class nsIPref;
 class nsIContent;
+class nsIURIContentListener;
 class nsIDOMDocument;
 
 // Interface ID for nsIWebShell
@@ -487,6 +488,9 @@ public:
   NS_IMETHOD GetHistoryState(nsISupports** aLayoutHistoryState) = 0;
   NS_IMETHOD SetHistoryState(nsISupports* aLayoutHistoryState) = 0;
 
+  NS_IMETHOD SetParentURIContentListener(nsIURIContentListener * aContentListener) = 0;
+  NS_IMETHOD GetParentURIContentListener(nsIURIContentListener ** aContentListener) = 0;
+
 };
 
 extern "C" NS_WEB nsresult