arc: Disable shelf item creation when secondary user is active.

chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.cc

 // Copyright 2013 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 "chrome/browser/ui/ash/launcher/chrome_launcher_controller_impl.h"
 
 #include <stddef.h>
 
 #include <vector>
 
@@ skipping 1577 matching lines @@
         new LauncherArcAppUpdater(this, profile_));
     app_updaters_.push_back(std::move(arc_app_updater));
   }
 
   app_list::AppListSyncableService* app_service =
       app_list::AppListSyncableServiceFactory::GetForProfile(profile_);
   if (app_service)
     app_service->AddObserverAndStart(this);
 }
 
+void ChromeLauncherControllerImpl::SetProfileForTest(Profile* profile) {
+  profile_ = profile;
+}
+
 void ChromeLauncherControllerImpl::ReleaseProfile() {
   if (app_sync_ui_state_)
     app_sync_ui_state_->RemoveObserver(this);
 
   app_updaters_.clear();
 
   prefs_observer_.reset();
 
   pref_change_registrar_.RemoveAll();
 
@@ skipping 100 matching lines @@
     if (index == -1)
       continue;
     ash::ShelfItem item = model_->items()[index];
     item.image = image;
     if (arc_deferred_launcher_)
       arc_deferred_launcher_->MaybeApplySpinningEffect(id, &item.image);
     model_->Set(index, item);
     // It's possible we're waiting on more than one item, so don't break.
   }
 }