Moved bluetooth adapter files to device/bluetooth/.

device/bluetooth/bluetooth_adapter_factory.h

 // Copyright (c) 2012 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 CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
-#define CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
+#ifndef DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
+#define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 
-namespace chromeos {
+namespace device {
 
 class BluetoothAdapter;
 
 // BluetoothAdapterFactory is a class that contains static methods, which
 // instantiate either a specific bluetooth adapter, or the generic "default
 // adapter" which may change depending on availability.
 class BluetoothAdapterFactory {
  public:
   // Returns the shared instance for the default adapter, whichever that may
-  // be at the time. Use IsPresent() and the AdapterPresentChanged() observer
-  // method to determine whether an adapter is actually available or not.
+  // be at the time. Check the returned scoped_refptr does not point to NULL and
+  // use IsPresent() and the AdapterPresentChanged() observer method to
+  // determine whether an adapter is actually available or not.
   static scoped_refptr<BluetoothAdapter> DefaultAdapter();
 
   // Creates an instance for a specific adapter at address |address|.
   static BluetoothAdapter* Create(const std::string& address);
 };
 
-}  // namespace chromeos
+}  // namespace device
 
-#endif  // CHROME_BROWSER_CHROMEOS_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_
+#endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_FACTORY_H_