Stop disabling force_compositing_mode for background RenderViews.

chrome/browser/extensions/gpu_browsertest.cc

 // Copyright (c) 2012 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.
 
-// Copyright (c) 2012 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 "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/ui/browser.h"
 #include "content/public/browser/render_view_host.h"
 #include "extensions/browser/extension_host.h"
 #include "extensions/browser/extension_system.h"
 #include "extensions/browser/process_manager.h"
 #include "webkit/common/webpreferences.h"
 
-// Tests that GPU acceleration is disabled for extension background
-// pages. See crbug.com/163698 .
-IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, WebKitPrefsBackgroundPage) {
+// Tests that background pages are marked as never visible to prevent GPU
+// resource allocation. See crbug.com/362165 and crbug.com/163698.
+IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, BackgroundPageIsNeverVisible) {
   ASSERT_TRUE(LoadExtension(
       test_data_dir_.AppendASCII("good").AppendASCII("Extensions")
                     .AppendASCII("behllobkkfkfnphdnhnkndlbkcpglgmj")
                     .AppendASCII("1.0.0.0")));
 
   extensions::ProcessManager* manager =
       extensions::ExtensionSystem::Get(browser()->profile())->process_manager();
   extensions::ExtensionHost* host =
       FindHostWithPath(manager, "/backgroundpage.html", 1);
-  WebPreferences prefs =
-      host->render_view_host()->GetWebkitPreferences();
-  ASSERT_FALSE(prefs.accelerated_compositing_enabled);
+  ASSERT_TRUE(host->host_contents()->GetDelegate()->IsNeverVisible(
+      host->host_contents()));
 }