Initialize OOBE/login WebUI in hidden state in parallel with wallpaper animation.

chrome/browser/chromeos/login/webui_login_view.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_WEBUI_LOGIN_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WEBUI_LOGIN_VIEW_H_
 
 #include <map>
 #include <string>
 
@@ skipping 52 matching lines @@
 
   // Returns current WebUI.
   content::WebUI* GetWebUI();
 
   // Returns current WebContents.
   content::WebContents* GetWebContents();
 
   // Opens proxy settings dialog.
   void OpenProxySettings();
 
+  // Called when WebUI is being shown after being initilized hidden.
+  void OnPostponedShow();
+
+  void set_is_hidden(bool hidden) { is_hidden_ = hidden; }
+
   // Toggles status area visibility.
   void SetStatusAreaVisible(bool visible);
 
  protected:
   // Let non-login derived classes suppress emission of this signal.
   void set_should_emit_login_prompt_visible(bool emit) {
     should_emit_login_prompt_visible_ = emit;
   }
 
   // Overridden from views::View:
@@ skipping 50 matching lines @@
 
   // Converts keyboard events on the WebContents to accelerators.
   UnhandledKeyboardEventHandler unhandled_keyboard_event_handler_;
 
   // Maps installed accelerators to OOBE webui accelerator identifiers.
   AccelMap accel_map_;
 
   // Whether the host window is frozen.
   bool host_window_frozen_;
 
+  // True when WebUI is being initialized hidden.
+  bool is_hidden_;
+
+  // True when NOTIFICATION_LOGIN_WEBUI_VISIBLE notification has fired.
+  bool login_visible_notification_fired_;
+
+  // True is login-prompt-visible event has been already handled.
+  bool login_prompt_visible_handled_;
+
   // Should we emit the login-prompt-visible signal when the login page is
   // displayed?
   bool should_emit_login_prompt_visible_;
 
   DISALLOW_COPY_AND_ASSIGN(WebUILoginView);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WEBUI_LOGIN_VIEW_H_