Block internal PlatformEvents before they are dispatched in touchview.

ash/wm/maximize_mode/maximize_mode_event_blocker.h

-// Copyright 2014 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_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_
-#define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_
-
-#include <set>
-
-#include "ash/shell_observer.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "ui/aura/scoped_window_targeter.h"
-
-namespace aura {
-class Window;
-}  // namespace aura
-
-namespace ash {
-
-class InternalInputDeviceList;
-class MaximizeModeControllerTest;
-
-// A class which blocks mouse and keyboard events while instantiated by
-// replacing the root window event targeter.
-class MaximizeModeEventBlocker : public ShellObserver {
- public:
-  MaximizeModeEventBlocker();
-  virtual ~MaximizeModeEventBlocker();
-
-  InternalInputDeviceList* internal_devices() {
-    return internal_devices_.get();
-  }
-
-  // ShellObserver:
-  virtual void OnRootWindowAdded(aura::Window* root_window) OVERRIDE;
-
- private:
-  friend class MaximizeModeControllerTest;
-
-  // Adds an event targeter on |root_window| to block mouse and keyboard events.
-  void AddEventTargeterOn(aura::Window* root_window);
-
-  ScopedVector<aura::ScopedWindowTargeter> targeters_;
-  scoped_ptr<InternalInputDeviceList> internal_devices_;
-
-  DISALLOW_COPY_AND_ASSIGN(MaximizeModeEventBlocker);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_EVENT_BLOCKER_H_