Reenable triggering of screen rotations by sensors.

ui/aura/screen_rotation.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 UI_AURA_SCREEN_ROTATION_H_
-#define UI_AURA_SCREEN_ROTATION_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "ui/base/animation/animation_delegate.h"
-#include "ui/gfx/compositor/layer_animation_element.h"
-#include "ui/gfx/point.h"
-
-namespace ui {
-class InterpolatedTransform;
-class LayerAnimationDelegate;
-}
-
-// A screen rotation represents a single transition from one screen orientation
-// to another. The  intended usage is that a new instance of the class is
-// created for every transition. It is possible to update the target orientation
-// in the middle of a transition.
-class ScreenRotation : public ui::LayerAnimationElement {
- public:
-  // The screen rotation does not own the view or the listener, and these
-  // objects are required to outlive the Screen rotation object.
-  ScreenRotation(int degrees);
-  virtual ~ScreenRotation();
-
- private:
-  // Implementation of ui::LayerAnimationDelegate
-  virtual void OnStart(ui::LayerAnimationDelegate* delegate) OVERRIDE;
-  virtual void OnProgress(double t,
-                          ui::LayerAnimationDelegate* delegate) OVERRIDE;
-  virtual void OnGetTarget(TargetValue* target) const OVERRIDE;
-  virtual void OnAbort() OVERRIDE;
-
-  static const ui::LayerAnimationElement::AnimatableProperties& GetProperties();
-
-  // Generates the intermediate transformation matrices used during the
-  // animation.
-  scoped_ptr<ui::InterpolatedTransform> interpolated_transform_;
-
-  // The number of degrees to rotate.
-  int degrees_;
-
-  // The target origin for |view_|
-  gfx::Point new_origin_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScreenRotation);
-};
-
-#endif  // UI_AURA_SCREEN_ROTATION_H_