Fix for bustage due to channel retargeting changes.

git-svn-id: svn://10.0.0.236/trunk@53767 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/docshell/base/nsDocShell.cpp

@@ -2003,4 +2003,7 @@ nsresult nsDocShell::GetPrimaryFrameFor(nsIContent* content, nsIFrame** frame)
    return NS_ERROR_FAILURE;
 }
 
-
+NS_IMETHODIMP nsDocShell::QueryCapability(const nsIID& anIID, void** aSink)
+{
+  return QueryInterface(anIID, aSink);
+}