Fix "unused variable" warnings.

device/bluetooth/dbus/fake_bluetooth_media_endpoint_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_MEDIA_ENDPOINT_SERVICE_PROVIDER_H_
 #define DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_MEDIA_ENDPOINT_SERVICE_PROVIDER_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 23 matching lines @@
   void SelectConfiguration(
       const std::vector<uint8_t>& capabilities,
       const Delegate::SelectConfigurationCallback& callback);
   void ClearConfiguration(const dbus::ObjectPath& transport_path);
   void Released();
 
   // Gets the path of the media endpoint object.
   const dbus::ObjectPath& object_path() const { return object_path_; }
 
  private:
-  // Indicates whether the endpoint object is visible or not.
-  bool visible_;
-
   // The path of the media endpoint object.
   dbus::ObjectPath object_path_;
 
   // All incoming method calls are passed to |delegate_|. |callback| passed to
   // |delegate_| will generate the response for those methods which have
   // non-void return.
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeBluetoothMediaEndpointServiceProvider);
 };
 
 }  // namespace bluez
 
 #endif  // DEVICE_BLUETOOTH_DBUS_FAKE_BLUETOOTH_MEDIA_ENDPOINT_SERVICE_PROVIDER_H_