dbus: add ObjectPath type

chrome/browser/chromeos/dbus/bluetooth_manager_client.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_DBUS_BLUETOOTH_MANAGER_CLIENT_H_
 #define CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_MANAGER_CLIENT_H_
 #pragma once
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/observer_list.h"
+#include "dbus/object_path.h"
 
 namespace dbus {
 class Bus;
 }  // namespace dbus
 
 namespace chromeos {
 
 // BluetoothManagerClient is used to communicate with the bluetooth
 // daemon's Manager interface.
 class BluetoothManagerClient {
  public:
   // Interface for observing changes from the bluetooth manager.
   class Observer {
    public:
     virtual ~Observer() {}
 
     // Called when a local bluetooth adapter is added.
     // |object_path| is the dbus object path of the adapter.
-    virtual void AdapterAdded(const std::string& object_path) {}
+    virtual void AdapterAdded(const dbus::ObjectPath& object_path) {}
 
     // Called when a local bluetooth adapter is removed.
     // |object_path| is the dbus object path of the adapter.
-    virtual void AdapterRemoved(const std::string& object_path) {}
+    virtual void AdapterRemoved(const dbus::ObjectPath& object_path) {}
 
     // Called when the default local bluetooth adapter changes.
-    // |adapter| is the dbus object path of the new default adapter.
+    // |object_path| is the dbus object path of the new default adapter.
     // Not called if all adapters are removed.
-    virtual void DefaultAdapterChanged(const std::string& adapter) {}
+    virtual void DefaultAdapterChanged(const dbus::ObjectPath& object_path) {}
   };
 
   virtual ~BluetoothManagerClient();
 
   // Adds and removes the observer.
   virtual void AddObserver(Observer* observer) = 0;
   virtual void RemoveObserver(Observer* observer) = 0;
 
   // The DefaultAdapterCallback receives two arguments:
-  // std::string adapter - the unique identifier of the default adapter
+  // dbus::ObjectPath object_path - the path of the new default adapter
   // bool success - whether or not the request succeeded
-  typedef base::Callback<void(const std::string&, bool)>
+  typedef base::Callback<void(const dbus::ObjectPath&, bool)>
       DefaultAdapterCallback;
 
   // Retrieves the dbus object path for the default adapter.
   // The default adapter is the preferred local bluetooth interface when a
   // client does not specify a particular interface.
   virtual void DefaultAdapter(const DefaultAdapterCallback& callback) = 0;
 
   // Creates the instance.
   static BluetoothManagerClient* Create(dbus::Bus* bus);
 
  protected:
   BluetoothManagerClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothManagerClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_MANAGER_CLIENT_H_