[Sync] Generalize StringOrdinal to handle ordinal_in_parent field

chrome/browser/extensions/extension_prefs.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_prefs.h"
 
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/extensions/admin_policy.h"
@@ skipping 1373 matching lines @@
 }
 
 void ExtensionPrefs::SetActionBoxOrder(const ExtensionIds& extension_ids) {
   SetExtensionPrefFromVector(kExtensionActionBox, extension_ids);
 }
 
 void ExtensionPrefs::OnExtensionInstalled(
     const Extension* extension,
     Extension::State initial_state,
     bool from_webstore,
-    const StringOrdinal& page_ordinal) {
+    const syncer::StringOrdinal& page_ordinal) {
   const std::string& id = extension->id();
   CHECK(Extension::IdIsValid(id));
   ScopedExtensionPrefUpdate update(prefs_, id);
   DictionaryValue* extension_dict = update.Get();
   const base::Time install_time = GetCurrentTime();
   extension_dict->Set(kPrefState, Value::CreateIntegerValue(initial_state));
   extension_dict->Set(kPrefLocation,
                       Value::CreateIntegerValue(extension->location()));
   extension_dict->Set(kPrefFromWebStore,
                       Value::CreateBooleanValue(from_webstore));
@@ skipping 17 matching lines @@
   // since it may change on disk.
   if (extension->location() != Extension::LOAD) {
     extension_dict->Set(kPrefManifest,
                         extension->manifest()->value()->DeepCopy());
   }
 
   // Clear state that may be registered from a previous install.
   extension_dict->Remove(kRegisteredEvents, NULL);
 
   if (extension->is_app()) {
-    StringOrdinal new_page_ordinal = page_ordinal.IsValid() ?
+    syncer::StringOrdinal new_page_ordinal = page_ordinal.IsValid() ?
         page_ordinal : extension_sorting_->GetNaturalAppPageOrdinal();
     if (!extension_sorting_->GetPageOrdinal(id).IsValid())
       extension_sorting_->SetPageOrdinal(id, new_page_ordinal);
     if (!extension_sorting_->GetAppLaunchOrdinal(id).IsValid())
       extension_sorting_->SetAppLaunchOrdinal(
           id, extension_sorting_->CreateNextAppLaunchOrdinal(new_page_ordinal));
   }
 
   extension_pref_value_map_->RegisterExtension(
       id, install_time, initial_state == Extension::ENABLED);
@@ skipping 708 matching lines @@
                                                 const ExtensionIds& strings) {
   ListPrefUpdate update(prefs_, pref);
   ListValue* list_of_values = update.Get();
   list_of_values->Clear();
   for (ExtensionIds::const_iterator iter = strings.begin();
        iter != strings.end(); ++iter)
     list_of_values->Append(new StringValue(*iter));
 }
 
 }  // namespace extensions