This will cause build failed since a include file does not exist.

chrome/browser/task_manager/task_manager_browsertest_util.h

Index: chrome/browser/task_manager/task_manager_browsertest_util.h
===================================================================
--- chrome/browser/task_manager/task_manager_browsertest_util.h	(revision 95777)
+++ chrome/browser/task_manager/task_manager_browsertest_util.h	(working copy)
@@ -1,18 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_
-#define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_
-#pragma once
-
-#include "chrome/browser/ui/browser.h"
-
-class TaskManagerBrowserTestUtil {
- public:
-  static void WaitForResourceChange(int target_count);
-
-  static void ShowTaskManagerAndWaitForReady(Browser* browser);
-};
-
-#endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_BROWSERTEST_UTIL_H_