[Sync] Use ExtractIntegerValue to extract request_id from js args

chrome/browser/ui/webui/sync_internals_message_handler.cc

 // Copyright 2014 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/sync_internals_message_handler.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/logging.h"
@@ skipping 137 matching lines @@
   web_ui()->CallJavascriptFunctionUnsafe(
       syncer::sync_ui_util::kDispatchEvent,
       base::StringValue(syncer::sync_ui_util::kOnReceivedListOfTypes),
       event_details);
 }
 
 void SyncInternalsMessageHandler::HandleGetAllNodes(
     const base::ListValue* args) {
   DCHECK_EQ(1U, args->GetSize());
   int request_id = 0;
-  bool success = args->GetInteger(0, &request_id);
+  bool success = ExtractIntegerValue(args, &request_id);
   DCHECK(success);
 
   ProfileSyncService* service = GetProfileSyncService();
   if (service) {
     service->GetAllNodes(
         base::Bind(&SyncInternalsMessageHandler::OnReceivedAllNodes,
                    weak_ptr_factory_.GetWeakPtr(), request_id));
   }
 }
 
@@ skipping 70 matching lines @@
       base::StringValue(syncer::sync_ui_util::kOnAboutInfoUpdated), *value);
 }
 
 // Gets the ProfileSyncService of the underlying original profile.
 // May return NULL (e.g., if sync is disabled on the command line).
 ProfileSyncService* SyncInternalsMessageHandler::GetProfileSyncService() {
   Profile* profile = Profile::FromWebUI(web_ui());
   return ProfileSyncServiceFactory::GetForProfile(
       profile->GetOriginalProfile());
 }