chromeos: Don't explicitly set system tray visibility during initialization

ash/common/system/tray/system_tray.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/tray/system_tray.h"
 
 #include "ash/common/key_event_watcher.h"
 #include "ash/common/login_status.h"
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/session/session_state_delegate.h"
@@ skipping 192 matching lines @@
   TrayBackgroundView::Initialize();
   CreateItems(delegate);
 }
 
 void SystemTray::Shutdown() {
   DCHECK(web_notification_tray_);
   web_notification_tray_ = nullptr;
 }
 
 void SystemTray::CreateItems(SystemTrayDelegate* delegate) {
-  WmShell* wm_shell = WmShell::Get();
 #if !defined(OS_WIN)
   // Create user items for each possible user.
-  int maximum_user_profiles =
-      wm_shell->GetSessionStateDelegate()->GetMaximumNumberOfLoggedInUsers();
+  int maximum_user_profiles = WmShell::Get()
+                                  ->GetSessionStateDelegate()
+                                  ->GetMaximumNumberOfLoggedInUsers();
   for (int i = 0; i < maximum_user_profiles; i++)
     AddTrayItem(new TrayUser(this, i));
 
   if (maximum_user_profiles > 1) {
     // Add a special double line separator between users and the rest of the
     // menu if more than one user is logged in.
     AddTrayItem(new TrayUserSeparator(this));
   }
 #endif
 
@@ skipping 31 matching lines @@
   if (tray_rotation_lock)
     AddTrayItem(tray_rotation_lock.release());
   AddTrayItem(new TraySettings(this));
   AddTrayItem(tray_update_);
   AddTrayItem(tray_date_);
 #elif defined(OS_WIN)
   AddTrayItem(tray_accessibility_);
   AddTrayItem(tray_update_);
   AddTrayItem(tray_date_);
 #endif
-
-  SetVisible(wm_shell->system_tray_delegate()->GetTrayVisibilityOnStartup());
 }
 
 void SystemTray::AddTrayItem(SystemTrayItem* item) {
   items_.push_back(item);
 
   SystemTrayDelegate* delegate = WmShell::Get()->system_tray_delegate();
   views::View* tray_item = item->CreateTrayView(delegate->GetUserLoginStatus());
   item->UpdateAfterShelfAlignmentChange(shelf_alignment());
 
   if (tray_item) {
@@ skipping 597 matching lines @@
           .work_area()
           .height();
   if (work_area_height > 0) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Ash.SystemMenu.PercentageOfWorkAreaHeightCoveredByMenu",
         100 * bubble_view->height() / work_area_height, 1, 300, 100);
   }
 }
 
 }  // namespace ash