Revert of [ash-md] Fades overview header in and out

ash/aura/wm_window_aura.h

Index: ash/aura/wm_window_aura.h
diff --git a/ash/aura/wm_window_aura.h b/ash/aura/wm_window_aura.h
index 03aa0396e78c48e6d3633ad8eef054d0b1fac73c..360ab9340a2409fe8fcb113676b32ce8abdc7bda 100644
--- a/ash/aura/wm_window_aura.h
+++ b/ash/aura/wm_window_aura.h
@@ -73,13 +73,10 @@
   bool IsVisible() const override;
   void SetOpacity(float opacity) override;
   float GetTargetOpacity() const override;
-  gfx::Rect GetMinimizeAnimationTargetBoundsInScreen() const override;
   void SetTransform(const gfx::Transform& transform) override;
   gfx::Transform GetTargetTransform() const override;
   bool IsSystemModal() const override;
   bool GetBoolProperty(WmWindowProperty key) override;
-  SkColor GetColorProperty(WmWindowProperty key) override;
-  void SetColorProperty(WmWindowProperty key, SkColor value) override;
   int GetIntProperty(WmWindowProperty key) override;
   void SetIntProperty(WmWindowProperty key, int value) override;
   ShelfItemDetails* GetShelfItemDetails() override;