Reland ScreenOrientationDelegate on ChromeOS

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 58 matching lines @@
   // True if |rotation_lock_| has been set, and OnAccelerometerUpdated will not
   // change the display rotation.
   bool rotation_locked() {
     return rotation_locked_;
   }
 
   // If |rotation_locked| future calls to OnAccelerometerUpdated will not
   // change the display rotation.
   void SetRotationLocked(bool rotation_locked);
 
+  // Sets the display rotation to |rotation| and prevents future calls to
+  // OnAccelerometerUpdated from changing the rotation. SetRotationLocked(false)
+  // removes the rotation lock.
+  void LockRotation(gfx::Display::Rotation rotation);
+
   // Add/Remove observers.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // True if it is possible to enter maximize mode in the current
   // configuration. If this returns false, it should never be the case that
   // maximize mode becomes enabled.
   bool CanEnterMaximizeMode();
 
   // TODO(jonross): Merge this with EnterMaximizeMode. Currently these are
@@ skipping 130 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_