Bug 1204809 - Notify (don't hang) third party windows when adding shortcut icon. r=jmathies

--HG--
extra : rebase_source : ba7544ad3f3d7909cb9d9886383f54a4b8f262aa

widget/windows/WinUtils.cpp

@@ -1379,9 +1379,8 @@ NS_IMETHODIMP AsyncEncodeAndWriteIcon::Run()
   fclose(file);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  // Cleanup
   if (mURLShortcut) {
-    SendMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS, 0);
+    SendNotifyMessage(HWND_BROADCAST, WM_SETTINGCHANGE, SPI_SETNONCLIENTMETRICS, 0);
   }
   return rv;
 }