PART1: Initiated the SignedSettings refactoring.

chrome/browser/ui/webui/options/chromeos/about_page_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/options/chromeos/about_page_handler.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 60 matching lines @@
   virtual void UpdateStatusChanged(UpdateLibrary* object) {
     page_handler_->UpdateStatus(object->status());
   }
 
   AboutPageHandler* page_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(UpdateObserver);
 };
 
 AboutPageHandler::AboutPageHandler()
-    : CrosOptionsPageUIHandler(
-          new UserCrosSettingsProvider),
-      progress_(-1),
+    : progress_(-1),
       sticky_(false),
       started_(false)
 {}
 
 AboutPageHandler::~AboutPageHandler() {
   if (update_observer_.get()) {
     CrosLibrary::Get()->GetUpdateLibrary()->
         RemoveObserver(update_observer_.get());
   }
 }
@@ skipping 318 matching lines @@
   if (CrosLibrary::Get()->GetUpdateLibrary()->HasObserver(observer)) {
     // If UpdateLibrary still has the observer, then the page handler is valid.
     AboutPageHandler* handler = observer->page_handler();
     scoped_ptr<Value> channel_string(Value::CreateStringValue(channel));
     handler->web_ui_->CallJavascriptFunction(
         "AboutPage.updateSelectedOptionCallback", *channel_string);
   }
 }
 
 } // namespace chromeos