It is time.

ui/aura/input_state_lookup.h

-// Copyright 2013 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_INPUT_STATE_LOOKUP_H_
-#define UI_AURA_INPUT_STATE_LOOKUP_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/aura/aura_export.h"
-
-namespace aura {
-
-// InputStateLookup is used to obtain the state of input devices.
-class AURA_EXPORT InputStateLookup {
- public:
-  virtual ~InputStateLookup() {}
-
-  // Creates the platform specific InputStateLookup. May return NULL.
-  static scoped_ptr<InputStateLookup> Create();
-
-  // Returns true if any mouse button is down.
-  virtual bool IsMouseButtonDown() const = 0;
-};
-
-}  // namespace aura
-
-#endif  // UI_AURA_INPUT_STATE_LOOKUP_H_