[Part 6 of 6] Move browsertests and utils to task_management/ directory

chrome/browser/task_manager/legacy_task_manager_tester.cc

 // Copyright 2016 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/task_manager/legacy_task_manager_tester.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/sessions/session_tab_helper.h"
 #include "chrome/browser/task_manager/resource_provider.h"
 #include "chrome/browser/task_manager/task_manager.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/grit/generated_resources.h"
 #include "extensions/strings/grit/extensions_strings.h"
 
-using ColumnSpecifier = task_manager::browsertest_util::ColumnSpecifier;
-
 namespace task_manager {
 
 class LegacyTaskManagerTesterImpl : public LegacyTaskManagerTester,
                                     public TaskManagerModelObserver {
  public:
   explicit LegacyTaskManagerTesterImpl(const base::Closure& on_resource_change)
       : on_resource_change_(on_resource_change),
         model_(TaskManager::GetInstance()->model()) {
     if (!on_resource_change_.is_null())
       model_->AddObserver(this);
@@ skipping 60 matching lines @@
   TaskManagerModel* model_;
 };
 
 // static
 std::unique_ptr<LegacyTaskManagerTester> LegacyTaskManagerTester::Create(
     const base::Closure& callback) {
   return base::WrapUnique(new LegacyTaskManagerTesterImpl(callback));
 }
 
 }  // namespace task_manager