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

content/browser/sensors/provider_impl.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_BROWSER_SENSORS_PROVIDER_IMPL_H_
-#define CONTENT_BROWSER_SENSORS_PROVIDER_IMPL_H_
-#pragma once
-
-#include "base/memory/ref_counted.h"
-#include "base/observer_list_threadsafe.h"
-#include "base/task.h"
-#include "content/browser/sensors/provider.h"
-
-template <typename T>
-struct DefaultSingletonTraits;
-
-namespace sensors {
-
-class ProviderImpl : public Provider {
- public:
-  static ProviderImpl* GetInstance();
-
-  // Provider implementation
-  virtual void AddListener(Listener* listener);
-  virtual void RemoveListener(Listener* listener);
-  virtual void ScreenOrientationChanged(const ScreenOrientation& change);
-
- private:
-  friend struct DefaultSingletonTraits<ProviderImpl>;
-
-  ProviderImpl();
-  virtual ~ProviderImpl();
-
-  typedef ObserverListThreadSafe<Listener> ListenerList;
-  scoped_refptr<ListenerList> listeners_;
-
-  DISALLOW_COPY_AND_ASSIGN(ProviderImpl);
-};
-
-}  // namespace sensors
-
-DISABLE_RUNNABLE_METHOD_REFCOUNT(sensors::ProviderImpl);
-
-#endif  // CONTENT_BROWSER_SENSORS_PROVIDER_IMPL_H_