Fix Volume slider is captured in screenshot done in touchview mode

ash/common/system/chromeos/network/tray_sms.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/common/system/chromeos/network/tray_sms.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/metrics/user_metrics_action.h"
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 #include "ash/common/system/tray/system_tray.h"
@@ skipping 393 matching lines @@
     return false;
   messages_.Remove(index, nullptr);
   return true;
 }
 
 void TraySms::Update(bool notify) {
   if (messages_.empty()) {
     if (default_)
       default_->SetVisible(false);
     if (detailed_)
-      HideDetailedView();
+      HideDetailedView(true);

[Daniel Erat, 2016/08/01 21:10:06]

nit: mind documenting the argument with an inline comment, e.g.

  HideDetailedView(true /* animate */);

[Qiang(Joe) Xu, 2016/08/01 22:56:47]

Done.

     HideNotificationView();
   } else {
     if (default_) {
       default_->SetVisible(true);
       default_->Update();
     }
     if (detailed_)
       detailed_->Update();
     if (notification_) {
       size_t index;
       std::string number, text;
       if (GetLatestMessage(&index, &number, &text))
         notification_->Update(index, number, text);
     } else if (notify) {
       ShowNotificationView();
     }
   }
 }
 
 }  // namespace ash