Backing out Bug 598112. This caused perma orange on 597742. a=me

modules/plugin/base/src/PluginPRLibrary.cpp

@@ -216,7 +216,7 @@ PluginPRLibrary::UseAsyncPainting(NPP instance, PRBool* aIsAsync)
 {
   nsNPAPIPluginInstance* inst = (nsNPAPIPluginInstance*)instance->ndata;
   NS_ENSURE_TRUE(inst, NS_ERROR_NULL_POINTER);
-  *aIsAsync = PR_FALSE;
+  aIsAsync = PR_FALSE;
   return NS_OK;
 }
 

modules/plugin/base/src/nsNPAPIPluginInstance.cpp

@@ -878,6 +878,9 @@ nsNPAPIPluginInstance::NotifyPainted(void)
 NS_IMETHODIMP
 nsNPAPIPluginInstance::UseAsyncPainting(PRBool* aIsAsync)
 {
+  if (RUNNING != mRunning)
+    return NS_OK;
+
   PluginDestructionGuard guard(this);
 
   if (!mPlugin)