[ash] Cleanup of ScopedOverviewAnimationSettings

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index 18176c7afb71f6ffd9394cd25bfb5579db2992bb..b436bbc059c58582cbb2b5994f3b639a2913119f 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -137,7 +137,7 @@ class ResizeShadowController;
 class ResolutionNotificationController;
 class RootWindowController;
 class ShellPort;
-class ScopedOverviewAnimationSettingsFactoryAura;
+class ScopedOverviewAnimationSettingsFactory;
 class ScreenLayoutObserver;
 class ScreenOrientationController;
 class ScreenshotController;
@@ -677,7 +677,7 @@ class ASH_EXPORT Shell : public SessionObserver,
   // when the screen is initially created.
   static bool initially_hide_cursor_;
 
-  std::unique_ptr<ScopedOverviewAnimationSettingsFactoryAura>
+  std::unique_ptr<ScopedOverviewAnimationSettingsFactory>
       scoped_overview_animation_settings_factory_;
   std::unique_ptr<ShellPort> shell_port_;