chrome: bluetooth: hook up DeviceCreated/Removed signals

chrome/browser/chromeos/dbus/bluetooth_adapter_client.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_ADAPTER_CLIENT_H_
 #define CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_ADAPTER_CLIENT_H_
 #pragma once
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/observer_list.h"
 #include "base/values.h"
 
 namespace dbus {
 class Bus;
 }  // namespace dbus
 
 namespace chromeos {
 
 // BluetoothAdapterClient is used to communicate with a bluetooth Adapter
 // interface.
 class BluetoothAdapterClient {
  public:
   // Interface for observing changes from a local bluetooth adapter.
   class Observer {
    public:
     virtual ~Observer() {}
 
+    // Called when a new known device has been created.
+    virtual void DeviceCreated(const std::string& object_path,
+                               const std::string& device_path) {}
+
+    // Called when a previously known device is removed.
+    virtual void DeviceRemoved(const std::string& object_path,
+                               const std::string& device_path) {}
+
     // Called when the adapter's Discovering property changes.
     virtual void DiscoveringPropertyChanged(const std::string& object_path,
                                             bool discovering) {}
 
     // Called when a new remote device has been discovered.
     // |device_properties| should be copied if needed.
     virtual void DeviceFound(const std::string& object_path,
                              const std::string& address,
                              const DictionaryValue& device_properties) {}
 
@@ skipping 24 matching lines @@
  protected:
   BluetoothAdapterClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_DBUS_BLUETOOTH_ADAPTER_CLIENT_H_