adding a blur method (0.9.4 branch). bug 57841 r=hyatt,rpotts a=valeski

git-svn-id: svn://10.0.0.236/branches/MOZILLA_0_9_4_BRANCH@109882 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/docshell/base/nsDocShell.cpp

@@ -1406,6 +1406,16 @@ nsDocShell::TabToTreeOwner(PRBool aForward, PRBool* aTookFocus)
     return NS_OK;
 }
 
+NS_IMETHODIMP
+nsDocShell::Blur()
+{
+  nsCOMPtr<nsIEmbeddingSiteWindow> window = do_GetInterface(mTreeOwner);
+  if (window)
+    return window->Blur();
+  
+  return NS_ERROR_FAILURE;
+}
+
 
 //*****************************************************************************
 // nsDocShell::nsIDocShellTreeItem