Move device/core files to device/base directory.

device/base/device_client.h

 // Copyright 2014 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_DEVICE_CLIENT_H_
-#define DEVICE_CORE_DEVICE_CLIENT_H_
+#ifndef DEVICE_BASE_DEVICE_CLIENT_H_
+#define DEVICE_BASE_DEVICE_CLIENT_H_
 
 #include "base/macros.h"
-#include "device/core/device_core_export.h"
+#include "device/base/device_base_export.h"
 
 namespace device {
 
 class HidService;
 class UsbService;
 
 // Interface used by consumers of //device APIs to get pointers to the service
 // singletons appropriate for a given embedding application. For an example see
 // //chrome/browser/chrome_device_client.h.
-class DEVICE_CORE_EXPORT DeviceClient {
+class DEVICE_BASE_EXPORT DeviceClient {
  public:
   // Construction sets the single instance.
   DeviceClient();
 
   // Destruction clears the single instance.
   virtual ~DeviceClient();
 
   // Returns the single instance of |this|.
   static DeviceClient* Get();
 
   // Returns the UsbService instance for this embedder.
   virtual UsbService* GetUsbService();
 
   // Returns the HidService instance for this embedder.
   virtual HidService* GetHidService();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DeviceClient);
 };
 
 }  // namespace device
 
-#endif  // DEVICE_CORE_DEVICE_CLIENT_H_
+#endif  // DEVICE_BASE_DEVICE_CLIENT_H_