Don't show tray on OOBE boot

chrome/browser/chromeos/login/webui_login_view.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 "chrome/browser/chromeos/login/webui_login_view.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray.h"
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 218 matching lines @@
 
 void WebUILoginView::OpenProxySettings() {
   ProxySettingsDialog* dialog =
       new ProxySettingsDialog(NULL, GetNativeWindow());
   dialog->Show();
 }
 
 void WebUILoginView::SetStatusAreaVisible(bool visible) {
   ash::SystemTray* tray = ash::Shell::GetInstance()->system_tray();
   if (tray) {
-    if (visible)
+    if (visible) {
+      // Tray may have been initialized being hidden.

[sadrul, 2012/07/25 17:47:28]

Do you know when/why this happens?

[Nikita (slow), 2012/07/25 17:54:17]

That is how it is initialized if it needs to be hidden:
SetVisible(ash::Shell::GetInstance()->tray_delegate()->
      GetTrayVisibilityOnStartup());

  status_area_widget_ = new internal::StatusAreaWidget();
  status_area_widget_->CreateTrayViews(delegate_.get());
  status_area_widget_->Show();

[sadrul, 2012/07/25 17:56:27]

Ah, cool. Thanks!

+      tray->SetVisible(visible);
       tray->GetWidget()->Show();
-    else
+    } else {
       tray->GetWidget()->Hide();
+    }
   }
 }
 
 // WebUILoginView protected: ---------------------------------------------------
 
 void WebUILoginView::Layout() {
   DCHECK(webui_login_);
   webui_login_->SetBoundsRect(bounds());
 }
 
@@ skipping 102 matching lines @@
   aura::Env::GetInstance()->set_render_white_bg(true);
 }
 
 void WebUILoginView::ReturnFocus(bool reverse) {
   // Return the focus to the web contents.
   webui_login_->web_contents()->FocusThroughTabTraversal(reverse);
   GetWidget()->Activate();
 }
 
 }  // namespace chromeos