Add DBus plumbing and tests for sending devices with ATT read/writes.

device/bluetooth/dbus/fake_bluetooth_gatt_descriptor_service_provider.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_DBUS_FAKE_BLUETOOTH_GATT_DESCRIPTOR_SERVICE_PROVIDER_H_
 #define DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_GATT_DESCRIPTOR_SERVICE_PROVIDER_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
@@ skipping 22 matching lines @@
       const dbus::ObjectPath& characteristic_path);
   ~FakeBluetoothGattDescriptorServiceProvider() override;
 
   // BluetoothGattDescriptorServiceProvider override.
   void SendValueChanged(const std::vector<uint8_t>& value) override;
 
   // Methods to simulate value get/set requests issued from a remote device. The
   // methods do nothing, if the associated service was not registered with the
   // GATT manager.
   void GetValue(
+      const dbus::ObjectPath& device_path,
       const device::BluetoothLocalGattService::Delegate::ValueCallback&
           callback,
       const device::BluetoothLocalGattService::Delegate::ErrorCallback&
           error_callback);
   void SetValue(
+      const dbus::ObjectPath& device_path,
       const std::vector<uint8_t>& value,
       const base::Closure& callback,
       const device::BluetoothLocalGattService::Delegate::ErrorCallback&
           error_callback);
 
   const dbus::ObjectPath& object_path() const override;
   const std::string& uuid() const { return uuid_; }
   const dbus::ObjectPath& characteristic_path() const {
     return characteristic_path_;
   }
@@ skipping 13 matching lines @@
 
   // The delegate that method calls are passed on to.
   std::unique_ptr<BluetoothGattAttributeValueDelegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBluetoothGattDescriptorServiceProvider);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_GATT_DESCRIPTOR_SERVICE_PROVIDER_H_