Fix a bug where window.screen would return 0, 0 as the width and height

content/browser/renderer_host/render_widget_host_gtk.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/render_widget_host.h"
 
 #include <gdk/gdkx.h>
 #include <gtk/gtk.h>
 
 #include "base/synchronization/lock.h"
@@ skipping 10 matching lines @@
 // http://crbug.com/9060 for more details.
 void RenderWidgetHost::OnMsgGetScreenInfo(gfx::NativeViewId view,
                                           WebScreenInfo* results) {
   GtkWidget* widget = NULL;
   GdkWindow* gdk_window = NULL;
   if (GtkNativeViewManager::GetInstance()->GetNativeViewForId(
       &widget, view) && widget) {
     gdk_window = widget->window;
   } else {
     GdkDisplay* display = gdk_display_get_default();
-    gdk_window = gdk_display_get_window_at_pointer(display, NULL, NULL);
+    gdk_window = gdk_display_get_default_group(display);
   }
   if (!gdk_window)
     return;
   GdkScreen* screen = gdk_drawable_get_screen(gdk_window);
   *results = WebScreenInfoFactory::screenInfo(
       gdk_x11_drawable_get_xdisplay(gdk_window),
       gdk_x11_screen_get_screen_number(screen));
 
   // TODO(tony): We should move this code into WebScreenInfoFactory.
   int monitor_number = gdk_screen_get_monitor_at_window(screen, gdk_window);
@@ skipping 68 matching lines @@
     for (int i = 0;
          i < static_cast<int>(deferred_plugin_handles_.size());
          i++) {
       if (deferred_plugin_handles_[i] == id) {
         deferred_plugin_handles_.erase(deferred_plugin_handles_.begin() + i);
         i--;
       }
     }
   }
 }