[ChromeOS] WebUI OOBE/Login refactoring.

chrome/browser/ui/webui/chromeos/login/oobe_ui.h

 // Copyright (c) 2011 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_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_
 #pragma once
 
 #include "chrome/browser/chromeos/login/oobe_display.h"
 #include "chrome/browser/ui/webui/chrome_web_ui.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace chromeos {
+class BaseScreenHandler;
 class SigninScreenHandler;
 }
 
 namespace chromeos {
 
-// Base class for the OOBE WebUI handlers.
-class OobeMessageHandler : public WebUIMessageHandler {
- public:
-  OobeMessageHandler();
-  virtual ~OobeMessageHandler();
-
-  // Gets localized strings to be used on the page.
-  virtual void GetLocalizedStrings(
-      base::DictionaryValue* localized_strings) = 0;
-
-  // This method is called when page is ready. It propagates to inherited class
-  // via virtual Initialize() method (see below).
-  void InitializeBase();
-
- protected:
-  // Called when the page is ready and handler can do initialization.
-  virtual void Initialize() = 0;
-
-  // Whether page is ready.
-  bool page_is_ready() const { return page_is_ready_; }
-
- private:
-  // Keeps whether page is ready.
-  bool page_is_ready_;
-
-  DISALLOW_COPY_AND_ASSIGN(OobeMessageHandler);
-};
-
 // A custom WebUI that defines datasource for out-of-box-experience (OOBE) UI:
 // - welcome screen (setup language/keyboard/network).
 // - eula screen (CrOS (+ OEM) EULA content/TPM password/crash reporting).
 // - update screen.
 class OobeUI : public OobeDisplay,
                public ChromeWebUI {
  public:
   explicit OobeUI(TabContents* contents);
 
   // OobeDisplay implementation:
   virtual void ShowScreen(WizardScreen* screen);
   virtual void HideScreen(WizardScreen* screen);
   virtual UpdateScreenActor* GetUpdateScreenActor();
   virtual NetworkScreenActor* GetNetworkScreenActor();
   virtual EulaScreenActor* GetEulaScreenActor();
   virtual ViewScreenDelegate* GetEnterpriseEnrollmentScreenActor();
   virtual ViewScreenDelegate* GetUserImageScreenActor();
   virtual ViewScreenDelegate* GetRegistrationScreenActor();
   virtual ViewScreenDelegate* GetHTMLPageScreenActor();
 
   // Collects localized strings from the owned handlers.
   void GetLocalizedStrings(base::DictionaryValue* localized_strings);
 
   // Initializes the handlers.
   void InitializeHandlers();
 
   void ShowSigninScreen();
 
  private:
-  void AddOobeMessageHandler(OobeMessageHandler* handler);
+  void AddScreenHandler(BaseScreenHandler* handler);
 
   // Screens actors. Note, OobeUI owns them via |handlers_|, not directly here.
   UpdateScreenActor* update_screen_actor_;
   NetworkScreenActor* network_screen_actor_;
   EulaScreenActor* eula_screen_actor_;
   SigninScreenHandler* signin_screen_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(OobeUI);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_OOBE_UI_H_