Separate handler initialization from page initialization

chrome/browser/ui/webui/options2/options_ui2.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_UI_WEBUI_OPTIONS2_OPTIONS_UI2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_OPTIONS_UI2_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 74 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(OptionsPageUIHandler);
 };
 
 // An interface for common operations that a host of OptionsPageUIHandlers
 // should provide.
 class OptionsPageUIHandlerHost {
  public:
   virtual void InitializeHandlers() = 0;
+  virtual void InitializePages() = 0;
 
  protected:
   virtual ~OptionsPageUIHandlerHost() {}
 };
 
 // The WebUI for chrome:settings-frame.
 class OptionsUI : public content::WebUIController,
                   public OptionsPageUIHandlerHost {
  public:
   explicit OptionsUI(content::WebUI* web_ui);
   virtual ~OptionsUI();
 
   // Takes the suggestions from |autocompleteResult| and adds them to
   // |suggestions| so that they can be passed to a JavaScript function.
   static void ProcessAutocompleteSuggestions(
       const AutocompleteResult& autocompleteResult,
       base::ListValue * const suggestions);
 
   static RefCountedMemory* GetFaviconResourceBytes();
 
   // WebUIController implementation.
   virtual void RenderViewCreated(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void RenderViewReused(
       content::RenderViewHost* render_view_host) OVERRIDE;
   virtual void DidBecomeActiveForReusedRenderView() OVERRIDE;
 
   // Overridden from OptionsPageUIHandlerHost:
   virtual void InitializeHandlers() OVERRIDE;
+  virtual void InitializePages() OVERRIDE;
 
  private:
   // Adds OptionsPageUiHandler to the handlers list if handler is enabled.
   void AddOptionsPageUIHandler(base::DictionaryValue* localized_strings,
                                OptionsPageUIHandler* handler);
 
   // Sets the WebUI CommandLineString property with arguments passed while
   // launching chrome.
   void SetCommandLineString(content::RenderViewHost* render_view_host);
 
   bool initialized_handlers_;
 
   std::vector<OptionsPageUIHandler*> handlers_;
 
 #if defined(OS_CHROMEOS)
   scoped_ptr<chromeos::system::PointerDeviceObserver>
       pointer_device_observer_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(OptionsUI);
 };
 
 }  // namespace options2
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_OPTIONS_UI2_H_