Animation changed to fade out on Launcher related bubbles.

ash/system/tray/tray_background_view.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/system/tray/tray_background_view.h"
 
 #include "ash/launcher/background_animator.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
@@ skipping 274 matching lines @@
   }
 }
 
 void TrayBackgroundView::InitializeBubbleAnimations(
     views::Widget* bubble_widget) {
   ash::SetWindowVisibilityAnimationType(
       bubble_widget->GetNativeWindow(),
       ash::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
   ash::SetWindowVisibilityAnimationTransition(
       bubble_widget->GetNativeWindow(),
-      ash::ANIMATE_BOTH);
+      ash::ANIMATE_HIDE);
   ash::SetWindowVisibilityAnimationDuration(
       bubble_widget->GetNativeWindow(),
       base::TimeDelta::FromMilliseconds(kAnimationDurationForPopupMS));
 }
 
 aura::Window* TrayBackgroundView::GetBubbleWindowContainer() const {
   return ash::Shell::GetContainer(
       tray_container()->GetWidget()->GetNativeWindow()->GetRootWindow(),
       ash::internal::kShellWindowId_SettingBubbleContainer);
 }
@@ skipping 61 matching lines @@
     views::TrayBubbleView* bubble_view) {
   aura::RootWindow* root_window =
       bubble_view->GetWidget()->GetNativeView()->GetRootWindow();
   ash::internal::ShelfLayoutManager* shelf =
       ash::GetRootWindowController(root_window)->shelf();
   bubble_view->SetPaintArrow(shelf->IsVisible());
 }
 
 }  // namespace internal
 }  // namespace ash