Refactor preference syncing.

chrome/browser/tabs/pinned_tab_codec.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/tabs/pinned_tab_codec.h"
 
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_tab_helper.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 71 matching lines @@
   tab->url = GURL(url_string);
 
   if (value.GetString(kAppID, &(tab->app_id)))
     tab->is_app = true;
 
   return true;
 }
 
 // static
 void PinnedTabCodec::RegisterUserPrefs(PrefService* prefs) {
-  prefs->RegisterListPref(prefs::kPinnedTabs);
+  prefs->RegisterListPref(prefs::kPinnedTabs, PrefService::UNSYNCABLE_PREF);
 }
 
 // static
 void PinnedTabCodec::WritePinnedTabs(Profile* profile) {
   PrefService* prefs = profile->GetPrefs();
   if (!prefs)
     return;
 
   ListValue values;
   for (BrowserList::const_iterator i = BrowserList::begin();
@@ skipping 23 matching lines @@
   for (size_t i = 0, max = pref_value->GetSize(); i < max; ++i) {
     DictionaryValue* values = NULL;
     if (pref_value->GetDictionary(i, &values)) {
       Tab tab;
       if (DecodeTab(*values, &tab))
         results.push_back(tab);
     }
   }
   return results;
 }