Fix Volume slider is captured in screenshot done in touchview mode

ash/common/system/tray/system_tray_item.h

Index: ash/common/system/tray/system_tray_item.h
diff --git a/ash/common/system/tray/system_tray_item.h b/ash/common/system/tray/system_tray_item.h
index 4925f6a81c67cf2349d5711568f196270ea7ad16..b83c2dff45b942f718ba345406e1f2490fe9ede3 100644
--- a/ash/common/system/tray/system_tray_item.h
+++ b/ash/common/system/tray/system_tray_item.h
@@ -121,8 +121,9 @@ class ASH_EXPORT SystemTrayItem {
   // 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();