Implement WebBluetooth getDescriptor[s]

device/bluetooth/test/mock_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_TEST_MOCK_BLUETOOTH_GATT_DESCRIPTOR_H_
 #define DEVICE_BLUETOOTH_TEST_MOCK_BLUETOOTH_GATT_DESCRIPTOR_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 #include "device/bluetooth/bluetooth_uuid.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace device {
 
 class MockBluetoothGattCharacteristic;
 
-// TODO(rkc): This class doesn't seem to be used anywhere. Figure out whether
-// it will be used (in which case, name it appropriately), otherwise delete the
-// class.
 class MockBluetoothGattDescriptor : public BluetoothRemoteGattDescriptor {
  public:
   MockBluetoothGattDescriptor(
       MockBluetoothGattCharacteristic* characteristic,
       const std::string& identifier,
       const BluetoothUUID& uuid,
       bool is_local,
       BluetoothRemoteGattCharacteristic::Permissions permissions);
   virtual ~MockBluetoothGattDescriptor();
 
@@ skipping 11 matching lines @@
                     const base::Closure&,
                     const ErrorCallback&));
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockBluetoothGattDescriptor);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_TEST_MOCK_BLUETOOTH_GATT_DESCRIPTOR_H_