arc: ARC loading progress should not be shown when started from OOBE.

chrome/browser/chromeos/arc/arc_support_host.h

 // Copyright 2016 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 CHROME_BROWSER_CHROMEOS_ARC_ARC_SUPPORT_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_ARC_ARC_SUPPORT_HOST_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 74 matching lines @@
   // The argument message_host is used to check if the given |message_host|
   // is what this instance uses know, to avoid racy case.
   // If |message_host| is different from the one this instance knows,
   // this is no op.
   void UnsetMessageHost(arc::ArcSupportMessageHost* message_host);
 
   // Sets the ARC managed state. This must be called before ARC support app
   // is started.
   void SetArcManaged(bool is_arc_managed);
 
+  // Sets silent mode that suppresses the showing UI page on low priority UI
+  // events such as Arc loading progress.
+  void SetSilentMode();
+
   // Requests to close the extension window.
   void Close();
 
   // Requests to show the "Terms Of Service" page.
   void ShowTermsOfService();
 
   // Requests to show the LSO page.
   void ShowLso();
 
   // Requests to show the "ARC is loading" page.
@@ skipping 70 matching lines @@
   // Fields below are UI parameter cache in case the value is set before
   // connection to the ARC support Chrome app is established.
   UIPage ui_page_ = UIPage::NO_PAGE;
 
   // These have valid values iff ui_page_ == ERROR.
   Error error_;
   bool should_show_send_feedback_;
 
   bool is_arc_managed_ = false;
 
+  // Silent mode suppresses the showing UI page on low priority UI events such
+  // as Arc loading progress.
+  bool silent_mode_ = false;
+
   PreferenceCheckboxData metrics_checkbox_;
   PreferenceCheckboxData backup_and_restore_checkbox_;
   PreferenceCheckboxData location_services_checkbox_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcSupportHost);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_ARC_ARC_SUPPORT_HOST_H_