[ash-md] Adjusts animation of the selector after closing an overview item

ash/common/wm/overview/window_selector_item.cc

Index: ash/common/wm/overview/window_selector_item.cc
diff --git a/ash/common/wm/overview/window_selector_item.cc b/ash/common/wm/overview/window_selector_item.cc
index ea26f45327b331a5b4f57eedf44fd0ab1b085429..11b2fc452c7440334a091d8bd22ef5260799963e 100644
--- a/ash/common/wm/overview/window_selector_item.cc
+++ b/ash/common/wm/overview/window_selector_item.cc
@@ -414,6 +414,7 @@ void WindowSelectorItem::ButtonPressed(views::Button* sender,
       AnimateOpacity(
           0.0, OverviewAnimationType::OVERVIEW_ANIMATION_CLOSE_SELECTOR_ITEM);
     }
+    window_selector_->SetSelectorOpacity(0.f);

[bruthig, 2016/07/04 17:06:22]

I feel like the actual opacity value of the WindowSelector::selection_widget_
should be an internal detail of the WindowSelector class.  Perhaps calling an
event callback like WindowSelector::WindowClosed|Closing() that abstracts away
the opacity value from the clients would be better.

[varkha, 2016/07/04 18:01:30]

Done.

     transform_window_.Close();
     return;
   }