Move device/core files to device/base directory.

device/base/mock_device_client.h

 // Copyright 2015 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 DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
-#define DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
+#ifndef DEVICE_BASE_MOCK_DEVICE_CLIENT_H_
+#define DEVICE_BASE_MOCK_DEVICE_CLIENT_H_
 
 #include <memory>
 
-#include "device/core/device_client.h"
+#include "device/base/device_client.h"
 
 namespace device {
 
 class HidService;
 class MockHidService;
 class MockUsbService;
 class UsbService;
 
 class MockDeviceClient : device::DeviceClient {
  public:
   MockDeviceClient();
   ~MockDeviceClient() override;
 
   // device::DeviceClient implementation:
   UsbService* GetUsbService() override;
   HidService* GetHidService() override;
 
   // Accessors for the mock instances.
   MockHidService* hid_service();
   MockUsbService* usb_service();
 
  private:
   std::unique_ptr<MockHidService> hid_service_;
   std::unique_ptr<MockUsbService> usb_service_;
 };
 
 }  // namespace device
 
-#endif  // DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
+#endif  // DEVICE_BASE_MOCK_DEVICE_CLIENT_H_