Move device/core files to device/base directory.

device/base/mock_device_client.h

Index: device/base/mock_device_client.h
diff --git a/device/core/mock_device_client.h b/device/base/mock_device_client.h
similarity index 81%
rename from device/core/mock_device_client.h
rename to device/base/mock_device_client.h
index 810b8ff168a758cfd804de6a61efcfcb658bc921..04fbd1679b3dfadb558cb4b6881b96486e2678c2 100644
--- a/device/core/mock_device_client.h
+++ b/device/base/mock_device_client.h
@@ -2,12 +2,12 @@
 // 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 {
 
@@ -36,4 +36,4 @@ class MockDeviceClient : device::DeviceClient {
 
 }  // namespace device
 
-#endif  // DEVICE_CORE_MOCK_DEVICE_CLIENT_H_
+#endif  // DEVICE_BASE_MOCK_DEVICE_CLIENT_H_