Remove DeviceMonitorLinux::WillDestroyCurrentMessageLoop().

chrome/browser/chromeos/device/input_service_test_helper.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/chromeos/device/input_service_test_helper.h"
 
 #include "base/bind.h"
+#include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "chrome/browser/chromeos/device/input_service_proxy.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/hid/fake_input_service_linux.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 using device::InputServiceLinux;
 using device::FakeInputServiceLinux;
 
 namespace chromeos {
 
 namespace {
 
 void InitInputServiceOnFileThread() {
-  InputServiceLinux::SetForTesting(new FakeInputServiceLinux());
+  InputServiceLinux::SetForTesting(base::MakeUnique<FakeInputServiceLinux>());
 }
 
 void AddDeviceOnFileThread(const InputDeviceInfo& device) {
   FakeInputServiceLinux* service =
       static_cast<FakeInputServiceLinux*>(InputServiceLinux::GetInstance());
   service->AddDeviceForTesting(device);
 }
 
 void RemoveDeviceOnFileThread(const std::string& id) {
   FakeInputServiceLinux* service =
@@ skipping 113 matching lines @@
 }
 
 void InputServiceTestHelper::RemoveDeviceFromService(bool is_mouse) {
   std::string id = is_mouse ? kMouseId : kKeyboardId;
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
                           base::Bind(&RemoveDeviceOnFileThread, id));
   observer_->WaitForDeviceRemoval(id);
 }
 
 }  // namespace chromeos