Add support in Chrome to send notifications to a specific device.

device/bluetooth/bluez/bluetooth_adapter_bluez.h

 // Copyright 2013 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_BLUEZ_BLUETOOTH_ADAPTER_BLUEZ_H_
 #define DEVICE_BLUETOOTH_BLUEZ_BLUETOOTH_ADAPTER_BLUEZ_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 159 matching lines @@
   void UnregisterGattService(
       BluetoothLocalGattServiceBlueZ* service,
       const base::Closure& callback,
       const device::BluetoothGattService::ErrorCallback& error_callback);
 
   // Returns if a given service is currently registered.
   bool IsGattServiceRegistered(BluetoothLocalGattServiceBlueZ* service);
 
   // Send a notification for this characteristic that its value has been
   // updated. If the service that owns that characteristic is not registered,
-  // this method will return false.
-  bool SendValueChanged(BluetoothLocalGattCharacteristicBlueZ* characteristic,
-                        const std::vector<uint8_t>& value);
+  // this method will return false. Setting |device| to nullptr will send the
+  // notification to all connected devices.
+  bool SendValueChanged(const device::BluetoothDevice* device,
+                        BluetoothLocalGattCharacteristicBlueZ* characteristic,
+                        const std::vector<uint8_t>& value,
+                        bool indicate);
 
   // Returns the object path of the adapter.
   dbus::ObjectPath GetApplicationObjectPath() const;
 
  protected:
   // BluetoothAdapter:
   void RemovePairingDelegateInternal(
       device::BluetoothDevice::PairingDelegate* pairing_delegate) override;
 
  private:
@@ skipping 271 matching lines @@
   // 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<BluetoothAdapterBlueZ> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothAdapterBlueZ);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_BLUEZ_BLUETOOTH_ADAPTER_BLUEZ_H_