[uber page] Split up initialization of handlers from initialization of webui pages

chrome/browser/ui/webui/options2/handler_options_handler2.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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_HANDLER_OPTIONS_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_HANDLER_OPTIONS_HANDLER2_H_
 
 #include <string>
 
 #include "chrome/browser/custom_handlers/protocol_handler_registry.h"
 #include "chrome/browser/ui/webui/options2/options_ui2.h"
 #include "chrome/common/custom_handlers/protocol_handler.h"
 #include "content/public/browser/notification_registrar.h"
 
+////////////////////////////////////////////////////////////////////////////////
+// HandlerOptionsHandler
+
+// Listen for changes to protocol handlers (i.e. registerProtocolHandler()).
+// This get triggered whenever a user allows a specific website or application
+// to handle clicks on a link with a specified protocol (i.e. mailto: -> Gmail).
+
 namespace base {
 class DictionaryValue;
 }
 
 namespace options2 {
 
 class HandlerOptionsHandler : public OptionsPageUIHandler {
  public:
   HandlerOptionsHandler();
   virtual ~HandlerOptionsHandler();
 
   // OptionsPageUIHandler implementation.
   virtual void GetLocalizedValues(
       base::DictionaryValue* localized_strings) OVERRIDE;
-  virtual void Initialize() OVERRIDE;
+  virtual void InitializeHandler() OVERRIDE;
+  virtual void InitializePage() OVERRIDE;
   virtual void RegisterMessages() OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
   // Called when the user toggles whether custom handlers are enabled.
   void SetHandlersEnabled(const ListValue* args);
@@ skipping 31 matching lines @@
   ProtocolHandlerRegistry* GetProtocolHandlerRegistry();
 
   content::NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(HandlerOptionsHandler);
 };
 
 }  // namespace options2
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_HANDLER_OPTIONS_HANDLER2_H_