[Offline Pages] Clean up some constant value types for proposed_offline_id arg.

chrome/browser/android/offline_pages/downloads/offline_page_download_bridge.cc

 // Copyright 2016 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/android/offline_pages/downloads/offline_page_download_bridge.h"
 
 #include <vector>
 
 #include "base/android/jni_string.h"
 #include "base/bind.h"
@@ skipping 234 matching lines @@
       base::MakeUnique<offline_pages::OfflinePageMHTMLArchiver>(web_contents);
 
   DownloadUIItem item;
   item.guid = client_id.id;
   item.url = url;
 
   OfflinePageNotificationBridge bridge;
   bridge.NotifyDownloadProgress(item);
 
   offline_page_model->SavePage(
-      url, client_id, 0ul, std::move(archiver),
+      url, client_id, 0l, std::move(archiver),
       base::Bind(&OfflinePageDownloadBridge::SavePageCallback, item));
 }
 
 void OfflinePageDownloadBridge::CancelDownload(
     JNIEnv* env,
     const JavaParamRef<jobject>& obj,
     const JavaParamRef<jstring>& j_guid) {
   std::string guid = ConvertJavaStringToUTF8(env, j_guid);
   RequestCoordinator* coordinator =
       RequestCoordinatorFactory::GetForBrowserContext(browser_context_);
@@ skipping 84 matching lines @@
 
   DownloadUIAdapter* adapter =
       DownloadUIAdapter::FromOfflinePageModel(offline_page_model);
 
   return reinterpret_cast<jlong>(
       new OfflinePageDownloadBridge(env, obj, adapter, browser_context));
 }
 
 }  // namespace android
 }  // namespace offline_pages