Notify the BluetoothAdapter::Observer when a bluetooth peripheral disconnects on Android and Mac.

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 64 matching lines @@
     // is not.
     virtual void AdapterDiscoveringChanged(BluetoothAdapter* adapter,
                                            bool discovering) {}
 
     // Called when a new device |device| is added to the adapter |adapter|,
     // either because it has been discovered or a connection made. |device|
     // should not be cached. Instead, copy its Bluetooth address.
     virtual void DeviceAdded(BluetoothAdapter* adapter,
                              BluetoothDevice* device) {}
 
-    // Called when properties of the device |device| known to the adapter
-    // |adapter| change. |device| should not be cached. Instead, copy its
-    // Bluetooth address.
+    // Called when the result of one of the following methods of the device
+    // |device| changes:
+    //  * GetAddress()
+    //  * GetAppearance()
+    //  * GetBluetoothClass()
+    //  * GetInquiryRSSI()
+    //  * GetInquiryTxPower()
+    //  * GetUUIDs()
+    //  * IsConnectable()
+    //  * IsConnected()
+    //  * IsConnecting()
+    //  * IsGattConnected()
+    //  * IsPaired()
+    //  * IsTrustable()
+    //
+    // |device| should not be cached. Instead, copy its Bluetooth address.
     virtual void DeviceChanged(BluetoothAdapter* adapter,
                                BluetoothDevice* device) {}
 
     // Called when address property of the device |device| known to the adapter
     // |adapter| change due to pairing.
     virtual void DeviceAddressChanged(BluetoothAdapter* adapter,
                                       BluetoothDevice* device,
                                       const std::string& old_address) {}
 
 #if defined(OS_CHROMEOS) || defined(OS_LINUX)
@@ skipping 323 matching lines @@
       const CreateAdvertisementCallback& callback,
       const CreateAdvertisementErrorCallback& error_callback) = 0;
 
   // Returns the local GATT services associated with this adapter with the
   // given identifier. Returns NULL if the service doesn't exist.
   virtual BluetoothLocalGattService* GetGattService(
       const std::string& identifier) const = 0;
 
   // The following methods are used to send various events to observers.
   void NotifyAdapterStateChanged(bool powered);
+  void NotifyDeviceChanged(BluetoothDevice* device);
+
 #if defined(OS_CHROMEOS) || defined(OS_LINUX)
   // This function is implemented for ChromeOS only, and the support on
   // Android, MaxOS and Windows should be added on demand in the future.
   void NotifyDevicePairedChanged(BluetoothDevice* device,
                                  bool new_paired_status);
 #endif
   void NotifyGattServiceAdded(BluetoothRemoteGattService* service);
   void NotifyGattServiceRemoved(BluetoothRemoteGattService* service);
   void NotifyGattServiceChanged(BluetoothRemoteGattService* service);
   void NotifyGattServicesDiscovered(BluetoothDevice* device);
@@ skipping 142 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_