bluetooth: android: register for adapter on/off events.

device/bluetooth/bluetooth_adapter.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 DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 380 matching lines @@
       const AcquiredCallback& callback,
       const BluetoothAudioSink::ErrorCallback& error_callback) = 0;
 
   // Creates and registers an advertisement for broadcast over the LE channel.
   // The created advertisement will be returned via the success callback.
   virtual void RegisterAdvertisement(
       scoped_ptr<BluetoothAdvertisement::Data> advertisement_data,
       const CreateAdvertisementCallback& callback,
       const CreateAdvertisementErrorCallback& error_callback) = 0;
 
+  // Send adapter state changed event to observers.
+  void NotifyAdapterStateChanged(bool powered);

[scheib, 2016/02/26 00:05:59]

Merge with block of all Notify* methods below, and fix that comment to not be
GATT specific.

[perja, 2016/02/26 10:51:04]

Done.

+
   // The following methods are used to send various GATT observer events to
   // observers.
   void NotifyGattServiceAdded(BluetoothGattService* service);
   void NotifyGattServiceRemoved(BluetoothGattService* service);
   void NotifyGattServiceChanged(BluetoothGattService* service);
   void NotifyGattServicesDiscovered(BluetoothDevice* device);
   void NotifyGattDiscoveryComplete(BluetoothGattService* service);
   void NotifyGattCharacteristicAdded(
       BluetoothGattCharacteristic* characteristic);
   void NotifyGattCharacteristicRemoved(
@@ skipping 137 matching lines @@
   std::set<BluetoothDiscoverySession*> discovery_sessions_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothAdapter> weak_ptr_factory_;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_ADAPTER_H_