[ash] Update applist button status when applist is hiding by outside event of applist button

ash/wm/app_list_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/app_list_controller.h"
 
 #include "ash/ash_switches.h"
 #include "ash/launcher/launcher.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
@@ skipping 182 matching lines @@
     }
     SetView(view);
     // By setting us as DnD recipient, the app list knows that we can
     // handle items.
     if (!CommandLine::ForCurrentProcess()->HasSwitch(
             ash::switches::kAshDisableDragAndDropAppListToLauncher)) {
       SetDragAndDropHostOfCurrentAppList(
           Launcher::ForWindow(window)->GetDragAndDropHostForAppList());
     }
   }
+  // Update applist button status when app list visibility is changed.
+  Launcher::ForWindow(window)->GetAppListButtonView()->SchedulePaint();
 }
 
 bool AppListController::IsVisible() const {
   return view_ && view_->GetWidget()->IsVisible();
 }
 
 aura::Window* AppListController::GetWindow() {
   return is_visible_ && view_ ? view_->GetWidget()->GetNativeWindow() : NULL;
 }
 
@@ skipping 208 matching lines @@
     should_snap_back_ = false;
     ui::ScopedLayerAnimationSettings animation(widget_animator);
     animation.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
         app_list::kOverscrollPageTransitionDurationMs));
     widget->SetBounds(view_bounds_);
   }
 }
 
 }  // namespace internal
 }  // namespace ash