bluetooth: android: Implement Characteristic GetIdentifier, fix Service IDs too.

device/bluetooth/bluetooth_gatt_descriptor.h

 // Copyright 2014 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_GATT_DESCRIPTOR_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_GATT_DESCRIPTOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 120 matching lines @@
   // descriptors. This method will return NULL if |uuid| is any one of the
   // unsupported predefined descriptor UUIDs.
   static BluetoothGattDescriptor* Create(
       const BluetoothUUID& uuid,
       const std::vector<uint8>& value,
       BluetoothGattCharacteristic::Permissions permissions);
 
   // Identifier used to uniquely identify a GATT descriptor object. This is
   // different from the descriptor UUID: while multiple descriptors with the
   // same UUID can exist on a Bluetooth device, the identifier returned from
-  // this method is unique among all descriptors of a device. The contents of
+  // this method is unique among all descriptors on the adapter. The contents of
   // the identifier are platform specific.
   virtual std::string GetIdentifier() const = 0;
 
   // The Bluetooth-specific UUID of the characteristic descriptor.
   virtual BluetoothUUID GetUUID() const = 0;
 
   // Returns true, if this characteristic descriptor is hosted locally. If
   // false, then this instance represents a remote descriptor.
   virtual bool IsLocal() const = 0;
 
@@ skipping 30 matching lines @@
   BluetoothGattDescriptor();
   virtual ~BluetoothGattDescriptor();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BluetoothGattDescriptor);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_GATT_DESCRIPTOR_H_