Bug 339470, [@ nsIMEStateManager::IsActive], p=masayuki@d-toybox.com, r+sr=roc

content/events/src/nsIMEStateManager.cpp

@@ -188,6 +188,7 @@ nsIMEStateManager::IsActive(nsPresContext* aPresContext)
     // This root window is not active.
     return PR_FALSE;
   }
+  NS_ENSURE_TRUE(aPresContext->GetPresShell(), PR_FALSE);
   nsIViewManager* vm = aPresContext->GetViewManager();
   NS_ENSURE_TRUE(vm, PR_FALSE);
   nsCOMPtr<nsIViewObserver> observer;