[Part 1 of 6] Move MockWebContentsTaskManager into its own file.

chrome/browser/ui/panels/panel_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.
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/net/url_request_mock_util.h"
 #include "chrome/browser/prefs/browser_prefs.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/task_management/task_management_browsertest_util.h"
+#include "chrome/browser/task_management/mock_web_contents_task_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/panels/base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/docked_panel_collection.h"
 #include "chrome/browser/ui/panels/native_panel.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
@@ skipping 1821 matching lines @@
                                expected_prefix,
                                base::CompareCase::INSENSITIVE_ASCII));
 
   PanelManager::GetInstance()->CloseAll();
   EXPECT_EQ(1U, task_manager.tasks().size());
 }
 
 }  // namespace
 
 #endif  // defined(ENABLE_TASK_MANAGER)