chromeos: Add a stub implementation for SensorsSource.

chrome/browser/chromeos/dbus/sensors_source.h

-// Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_DBUS_SENSORS_SOURCE_H_
-#define CHROME_BROWSER_CHROMEOS_DBUS_SENSORS_SOURCE_H_
-
-#include "base/memory/weak_ptr.h"
-#include "content/browser/browser_thread.h"
-
-#include <string>
-
-namespace dbus {
-class Bus;
-class ObjectProxy;
-class Signal;
-}  // namespace
-
-namespace chromeos {
-
-// Creates and manages a dbus signal receiver for device orientation changes,
-// and eventually receives data for other motion-related sensors.
-class SensorsSource {
- public:
-  // Creates an inactive sensors source.
-  SensorsSource();
-  virtual ~SensorsSource();
-
-  // Initializes this sensor source and begins listening for signals.
-  // Returns true on success.
-  void Init(dbus::Bus* bus);
-
- private:
-  // Called by dbus:: in when an orientation change signal is received.
-  void OrientationChangedReceived(dbus::Signal* signal);
-
-  // Called by dbus:: when the orientation change signal is initially connected.
-  void OrientationChangedConnected(const std::string& interface_name,
-                                   const std::string& signal_name,
-                                   bool success);
-
-  dbus::ObjectProxy* sensors_proxy_;
-  base::WeakPtrFactory<SensorsSource> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SensorsSource);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_DBUS_SENSORS_SOURCE_H_