Fix Volume slider is captured in screenshot done in touchview mode

ash/common/system/tray/system_tray_item.h

 // 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.
 
 #ifndef ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_ITEM_H_
 #define ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_ITEM_H_
 
 #include "ash/ash_export.h"
 #include "ash/common/login_status.h"
 #include "ash/common/shelf/shelf_types.h"
@@ skipping 103 matching lines @@
   // something, e.g. volume, network availability etc. changes). If
   // |for_seconds| is non-zero, then the popup is closed after the specified
   // time.
   void PopupDetailedView(int for_seconds, bool activate);
 
   // Continue showing the currently-shown detailed view, if any, for
   // |for_seconds| seconds.  The caller is responsible for checking that the
   // currently-shown view is for this item.
   void SetDetailedViewCloseDelay(int for_seconds);
 
-  // Hides the detailed view for this item.
-  void HideDetailedView();
+  // Hides the detailed view for this item. Disable hiding animation if
+  // |animate| is false.
+  void HideDetailedView(bool animate);
 
   // Shows a notification for this item.
   void ShowNotificationView();
 
   // Hides the notification for this item.
   void HideNotificationView();
 
   // Returns true if item should hide the arrow.
   virtual bool ShouldHideArrow() const;
 
@@ skipping 16 matching lines @@
   SystemTray* system_tray_;
   UmaType uma_type_;
   bool restore_focus_;
 
   DISALLOW_COPY_AND_ASSIGN(SystemTrayItem);
 };
 
 }  // namespace ash
 
 #endif  // ASH_COMMON_SYSTEM_TRAY_SYSTEM_TRAY_ITEM_H_