|  | // 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 "content/public/test/browser_test.h" | 
|  | #include "extensions/browser/extension_host.h" | 
|  | #include "extensions/browser/process_manager.h" | 
|  |  | 
|  | namespace extensions { | 
|  |  | 
|  | // Tests that background pages are marked as never composited to prevent GPU | 
|  | // resource allocation. See crbug.com/362165 and crbug.com/163698. | 
|  | IN_PROC_BROWSER_TEST_F(ExtensionBrowserTest, BackgroundPageIsNeverComposited) { | 
|  | ASSERT_TRUE(LoadExtension( | 
|  | test_data_dir_.AppendASCII("good").AppendASCII("Extensions") | 
|  | .AppendASCII("behllobkkfkfnphdnhnkndlbkcpglgmj") | 
|  | .AppendASCII("1.0.0.0"))); | 
|  |  | 
|  | ProcessManager* manager = ProcessManager::Get(browser()->profile()); | 
|  | ExtensionHost* host = FindHostWithPath(manager, "/backgroundpage.html", 1); | 
|  | ASSERT_TRUE(host->host_contents()->GetDelegate()->IsNeverComposited( | 
|  | host->host_contents())); | 
|  | } | 
|  |  | 
|  | }  // namespace extensions |