Lock rotation when screen is manually rotated.

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_manager.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
+#include "ui/gfx/display.h"
 
 namespace ui {
 class EventHandler;
 }
 
 namespace ash {
 
 class MaximizeModeControllerTest;
 class MaximizeModeEventBlocker;
 
@@ skipping 39 matching lines @@
                            const gfx::Vector3dF& lid);
 
   // Detect screen rotation from |lid| accelerometer and automatically rotate
   // screen.
   void HandleScreenRotation(const gfx::Vector3dF& lid);
 
   // Sets the display rotation and suppresses display notifications.
   void SetDisplayRotation(DisplayManager* display_manager,
                           gfx::Display::Rotation rotation);
 
+  // Enables MaximizeModeWindowManager, and determines the current state of
+  // rotation lock.
+  void EnterMaximizeMode();
+
+  // Removes MaximizeModeWindowManager and resets the display rotation if there
+  // is no rotation lock.
+  void LeaveMaximizeMode();
+
   // An event targeter controller which traps mouse and keyboard events while
   // maximize mode is engaged.
   scoped_ptr<MaximizeModeEventBlocker> 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 the screen's orientation is being changed.
   bool in_set_screen_rotation_;
 
+  // The rotation of the display set by the user. This rotation will be
+  // restored upon exiting maximize mode.
+  gfx::Display::Rotation user_rotation_;
+
   DISALLOW_COPY_AND_ASSIGN(MaximizeModeController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_MAXIMIZE_MODE_MAXIMIZE_MODE_CONTROLLER_H_