b=561308,539138 Realize GtkPlugs when associated with a socket for consistency with in-process behavior r=cjones

--HG--
extra : rebase_source : 96d433c381d6d560ddd566572cfc143d91113453

dom/plugins/PluginInstanceChild.cpp

@@ -799,9 +799,11 @@ PluginInstanceChild::AnswerNPP_SetWindow(const NPRemoteWindow& aWindow)
                          &mWsInfo.visual, &mWsInfo.depth))
         return false;
 
-    if (aWindow.type == NPWindowTypeWindow) {
 #ifdef MOZ_WIDGET_GTK2
-        if (GdkWindow* socket_window = gdk_window_lookup(aWindow.window)) {
+    if (aWindow.type == NPWindowTypeWindow
+        && gtk_check_version(2,18,7) != NULL) { // older
+        GdkWindow* socket_window = gdk_window_lookup(aWindow.window);
+        if (socket_window) {
             // A GdkWindow for the socket already exists.  Need to
             // workaround https://bugzilla.gnome.org/show_bug.cgi?id=607061
             // See wrap_gtk_plug_embedded in PluginModuleChild.cpp.
@@ -809,8 +811,8 @@ PluginInstanceChild::AnswerNPP_SetWindow(const NPRemoteWindow& aWindow)
                               "moz-existed-before-set-window",
                               GUINT_TO_POINTER(1));
         }
-#endif
     }
+#endif
 
     if (mPluginIface->setwindow)
         (void) mPluginIface->setwindow(&mData, &mWindow);

dom/plugins/PluginModuleChild.cpp

@@ -318,14 +318,20 @@ gtk_plug_scroll_event(GtkWidget *widget, GdkEventScroll *gdk_event)
 static void
 wrap_gtk_plug_embedded(GtkPlug* plug) {
     GdkWindow* socket_window = plug->socket_window;
-    if (socket_window &&
-        g_object_get_data(G_OBJECT(socket_window),
+    if (socket_window) {
+        if (gtk_check_version(2,18,7) != NULL // older
+            && g_object_get_data(G_OBJECT(socket_window),
                                  "moz-existed-before-set-window")) {
             // Add missing reference for
             // https://bugzilla.gnome.org/show_bug.cgi?id=607061
             g_object_ref(socket_window);
         }
 
+        // Ensure the window exists to make this GtkPlug behave like an
+        // in-process GtkPlug for Flash Player.  (Bugs 561308 and 539138).
+        gtk_widget_realize(GTK_WIDGET(plug));
+    }
+
     if (*real_gtk_plug_embedded) {
         (*real_gtk_plug_embedded)(plug);
     }
@@ -448,11 +454,9 @@ PluginModuleChild::InitGraphics()
         *scroll_event = gtk_plug_scroll_event;
     }
 
-    if (gtk_check_version(2,18,7) != NULL) { // older
     GtkPlugEmbeddedFn* embedded = &GTK_PLUG_CLASS(gtk_plug_class)->embedded;
     real_gtk_plug_embedded = *embedded;
     *embedded = wrap_gtk_plug_embedded;
-    }
 
 #elif defined(MOZ_WIDGET_QT)
     nsQAppInstance::AddRef();