Move the Mac Task Manager to the new backend code.

chrome/browser/task_manager/task_manager_tester_nonmac.cc

Index: chrome/browser/task_manager/task_manager_tester_nonmac.cc
diff --git a/chrome/browser/task_manager/task_manager_tester_nonmac.cc b/chrome/browser/task_manager/task_manager_tester_nonmac.cc
deleted file mode 100644
index 7edd15cd9a4ff3506ccb5e71c91a821ca50cc12e..0000000000000000000000000000000000000000
--- a/chrome/browser/task_manager/task_manager_tester_nonmac.cc
+++ /dev/null
@@ -1,30 +0,0 @@
-// 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_management/task_manager_tester.h"
-
-#include "chrome/browser/task_management/task_manager_interface.h"
-
-// TODO(tapted): Delete this file and rename CreateDefault() to Create() when
-// there is no longer a legacy task manager.
-
-namespace task_management {
-
-std::unique_ptr<TaskManagerTester> TaskManagerTester::Create(
-    const base::Closure& callback) {
-#if defined(OS_MACOSX)
-  // This Create() method doesn't attempt to create a tester for the legacy
-  // interface, so disabling the new task manager on Mac have no effect.
-  DCHECK(TaskManagerInterface::IsNewTaskManagerEnabled());
-#endif
-  return TaskManagerTester::CreateDefault(callback);
-}
-
-void TaskManagerTester::MaybeRefreshLegacyInstance() {
-#if defined(OS_MACOSX)
-  DCHECK(TaskManagerInterface::IsNewTaskManagerEnabled());
-#endif
-}
-
-}  // namespace task_management