Remove TransparentActivateWindowButton from Overview Mode

ash/wm/overview/scoped_overview_animation_settings.h

Index: ash/wm/overview/scoped_overview_animation_settings.h
diff --git a/ash/wm/overview/scoped_overview_animation_settings.h b/ash/wm/overview/scoped_overview_animation_settings.h
index a558c7ee6389a535e63b9cb45310a870788956a0..4ea09e53a480cc2e606a3708cfe3cfcce89017b4 100644
--- a/ash/wm/overview/scoped_overview_animation_settings.h
+++ b/ash/wm/overview/scoped_overview_animation_settings.h
@@ -24,6 +24,11 @@ class ScopedOverviewAnimationSettings {
                                   aura::Window* window);
   virtual ~ScopedOverviewAnimationSettings();
 
+  // Convenvience method to fade in a Window with predefined animation settings.
+  // Note: The fade in animation will occur after a delay where the delay is how
+  // long the lay out animations take.
+  static void SetupFadeInAfterLayout(aura::Window* window);
+
  private:
   // The managed animation settings.
   ui::ScopedLayerAnimationSettings animation_settings_;