Rename MaximizeMode to TabletMode

ash/display/screen_orientation_controller_chromeos.h

Index: ash/display/screen_orientation_controller_chromeos.h
diff --git a/ash/display/screen_orientation_controller_chromeos.h b/ash/display/screen_orientation_controller_chromeos.h
index b64d4c1697588f03223d92d299ef73a74a00fe72..4248a8aeb7ce772a3c895339814631b9986ee97c 100644
--- a/ash/display/screen_orientation_controller_chromeos.h
+++ b/ash/display/screen_orientation_controller_chromeos.h
@@ -116,8 +116,8 @@ class ASH_EXPORT ScreenOrientationController
   void OnDisplayConfigurationChanged() override;
 
   // ShellObserver:
-  void OnMaximizeModeStarted() override;
-  void OnMaximizeModeEnding() override;
+  void OnTabletModeStarted() override;
+  void OnTabletModeEnding() override;
 
  private:
   friend class test::ScreenOrientationControllerTestApi;
@@ -214,7 +214,7 @@ class ASH_EXPORT ScreenOrientationController
   blink::WebScreenOrientationLockType rotation_locked_orientation_;
 
   // The rotation of the display set by the user. This rotation will be
-  // restored upon exiting maximize mode.
+  // restored upon exiting tablet mode.
   display::Display::Rotation user_rotation_;
 
   // The orientation of the device locked by the user.