Implement ScreenOrientationDelegate on ChromeOS

ash/wm/maximize_mode/maximize_mode_controller.h

Index: ash/wm/maximize_mode/maximize_mode_controller.h
diff --git a/ash/wm/maximize_mode/maximize_mode_controller.h b/ash/wm/maximize_mode/maximize_mode_controller.h
index 4210f27453dff955f1e3e0668ceac0db15f1a1d2..e103548178e153344057d0911bf09e4e5721e319 100644
--- a/ash/wm/maximize_mode/maximize_mode_controller.h
+++ b/ash/wm/maximize_mode/maximize_mode_controller.h
@@ -76,6 +76,11 @@ class ASH_EXPORT MaximizeModeController
   // 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);