Revert 93094 - Initial sensor event provider for testing views screen rotation

content/common/sensors_listener.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 CONTENT_COMMON_SENSORS_LISTENER_H_
-#define CONTENT_COMMON_SENSORS_LISTENER_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "content/common/sensors.h"
-
-namespace sensors {
-
-// The sensors API will unify various types of sensor data into a set of
-// channels, each of which provides change events and periodic updates.
-//
-// This version of the API is intended only to support the experimental screen
-// rotation code and is not for general use. In particular, the final listener
-// will declare generic |OnSensorChanged| and |OnSensorUpdated| methods, rather
-// than the special-purpose |OnScreenOrientationChanged|.
-//
-class Listener {
- public:
-  // Called whenever the coarse orientation of the device changes.
-  virtual void OnScreenOrientationChanged(const ScreenOrientation& change) = 0;
-
- protected:
-  Listener() {}
-  virtual ~Listener() {}
-
-  DISALLOW_COPY_AND_ASSIGN(Listener);
-};
-
-}  // namespace sensors
-
-#endif  // CONTENT_COMMON_SENSORS_LISTENER_H_