Refactor preference syncing.

chrome/browser/extensions/extension_web_ui.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/extensions/extension_web_ui.h"
 
 #include <set>
 #include <vector>
 
 #include "base/string_util.h"
@@ skipping 222 matching lines @@
 gfx::NativeView ExtensionWebUI::GetNativeViewOfHost() {
   RenderWidgetHostView* rwhv = tab_contents()->GetRenderWidgetHostView();
   return rwhv ? rwhv->GetNativeView() : NULL;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // chrome:// URL overrides
 
 // static
 void ExtensionWebUI::RegisterUserPrefs(PrefService* prefs) {
-  prefs->RegisterDictionaryPref(kExtensionURLOverrides);
+  prefs->RegisterDictionaryPref(kExtensionURLOverrides,
+                                PrefService::UNSYNCABLE_PREF);
 }
 
 // static
 bool ExtensionWebUI::HandleChromeURLOverride(GURL* url, Profile* profile) {
   if (!url->SchemeIs(chrome::kChromeUIScheme))
     return false;
 
   const DictionaryValue* overrides =
       profile->GetPrefs()->GetDictionary(kExtensionURLOverrides);
   std::string page = url->host();
@@ skipping 195 matching lines @@
 }
 
 // static
 void ExtensionWebUI::GetFaviconForURL(Profile* profile,
     FaviconService::GetFaviconRequest* request, const GURL& page_url) {
   // tracker deletes itself when done.
   ExtensionWebUIImageLoadingTracker* tracker =
       new ExtensionWebUIImageLoadingTracker(profile, request, page_url);
   tracker->Init();
 }