Bug 1130747: Add more error checking to PluginAsyncSurrogate::GetPropertyHelper; r=jimm

--HG--
extra : rebase_source : 61f90caee29ea9776c0ebf89d70bec3d82f23d8e

dom/plugins/ipc/PluginAsyncSurrogate.cpp

@@ -603,10 +603,15 @@ PluginAsyncSurrogate::GetPropertyHelper(NPObject* aObject, NPIdentifier aName,
     return false;
   }
 
-  WaitForInit();
+  if (!WaitForInit()) {
+    return false;
+  }
 
   AsyncNPObject* object = static_cast<AsyncNPObject*>(aObject);
   NPObject* realObject = object->GetRealObject();
+  if (!realObject) {
+    return false;
+  }
   if (realObject->_class != PluginScriptableObjectParent::GetClass()) {
     NS_ERROR("Don't know what kind of object this is!");
     return false;