Revert of Rename MaximizeMode to TabletMode

ash/wm/tablet_mode/tablet_mode_event_handler.h

-// Copyright 2016 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 ASH_WM_TABLET_MODE_TABLET_MODE_EVENT_HANDLER_H_
-#define ASH_WM_TABLET_MODE_TABLET_MODE_EVENT_HANDLER_H_
-
-#include "base/macros.h"
-
-namespace ui {
-class TouchEvent;
-}
-
-namespace ash {
-namespace wm {
-
-// TabletModeEventHandler handles toggling fullscreen when appropriate.
-// TabletModeEventHandler installs event handlers in an environment specific
-// way, e.g. EventHandler for aura.
-class TabletModeEventHandler {
- public:
-  TabletModeEventHandler();
-  virtual ~TabletModeEventHandler();
-
- protected:
-  // Subclasses call this to toggle fullscreen. If a toggle happened returns
-  // true.
-  bool ToggleFullscreen(const ui::TouchEvent& event);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TabletModeEventHandler);
-};
-
-}  // namespace wm
-}  // namespace ash
-
-#endif  // ASH_WM_TABLET_MODE_TABLET_MODE_EVENT_HANDLER_H_