Bug 518924 - Implement NPN_AsyncCallback r=cjones

dom/plugins/PluginModuleChild.cpp

@@ -1268,14 +1268,35 @@ _poppopupsenabledstate(NPP aNPP)
     return false;
 }
 
+class AsyncCallRunnable : public nsRunnable
+{
+public:
+    AsyncCallRunnable(PluginThreadCallback aFunc, void* aUserData)
+        : mFunc(aFunc)
+        , mData(aUserData)
+    { }
+
+    NS_IMETHOD Run() {
+        mFunc(mData);
+        return NS_OK;
+    }
+
+private:
+    PluginThreadCallback mFunc;
+    void* mData;
+};
+
 void NP_CALLBACK
 _pluginthreadasynccall(NPP aNPP,
                        PluginThreadCallback aFunc,
                        void* aUserData)
 {
     _MOZ_LOG(__FUNCTION__);
-    AssertPluginThread();
-    NS_NOTYETIMPLEMENTED("Implement me!");
+    if (!aFunc)
+        return;
+
+    nsCOMPtr<nsIRunnable> e(new AsyncCallRunnable(aFunc, aUserData));
+    NS_DispatchToMainThread(e);
 }
 
 NPError NP_CALLBACK