Added quick lock mechanism while in Touchview

ash/wm/maximize_mode/maximize_mode_controller.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_CONTROLLER_H_
 #define ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_
 
 #include "ash/accelerometer/accelerometer_observer.h"
 #include "ash/ash_export.h"
 #include "ash/display/display_controller.h"
@@ skipping 157 matching lines @@
   // preferences. These are then applied.
   void LoadDisplayRotationProperties();
 
   // The maximized window manager (if enabled).
   scoped_ptr<MaximizeModeWindowManager> maximize_mode_window_manager_;
 
   // A helper class which when instantiated will block native events from the
   // internal keyboard and touchpad.
   scoped_ptr<ScopedDisableInternalMouseAndKeyboard> event_blocker_;
 
-  // An event handler used to detect screenshot actions while in maximize mode.
-  scoped_ptr<ui::EventHandler> event_handler_;
-
   // When true calls to OnAccelerometerUpdated will not rotate the display.
   bool rotation_locked_;
 
   // Whether we have ever seen accelerometer data.
   bool have_seen_accelerometer_data_;
 
   // True when changes being applied cause OnDisplayConfigurationChanged() to be
   // called, and for which these changes should be ignored.
   bool ignore_display_configuration_updates_;
 
@@ skipping 29 matching lines @@
 
   // Tracks when the lid is closed. Used to prevent entering maximize mode.
   bool lid_is_closed_;
 
   DISALLOW_COPY_AND_ASSIGN(MaximizeModeController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_