Add missing using statements for JNI types.

chrome/browser/android/download/download_manager_service.cc

 // Copyright 2015 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/download/download_manager_service.h"
 
 #include "base/android/jni_string.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "chrome/browser/android/download/download_controller.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/grit/generated_resources.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/download_item.h"
 #include "jni/DownloadManagerService_jni.h"
 #include "ui/base/l10n/l10n_util.h"
 
 using base::android::JavaParamRef;
 using base::android::ConvertJavaStringToUTF8;
 using base::android::ConvertUTF8ToJavaString;
+using base::android::ScopedJavaLocalRef;
 
 namespace {
 
 bool ShouldShowDownloadItem(content::DownloadItem* item) {
   return !item->IsTemporary() &&
       !item->GetFileNameToReportUser().empty() &&
       !item->GetTargetFilePath().empty() &&
       item->GetState() == content::DownloadItem::COMPLETE;
 }
 
@@ skipping 289 matching lines @@
     resume_callback_for_testing_.Run(false);
 }
 
 content::DownloadManager* DownloadManagerService::GetDownloadManager(
     bool is_off_the_record) {
   Profile* profile = ProfileManager::GetActiveUserProfile();
   if (is_off_the_record)
     profile = profile->GetOffTheRecordProfile();
   return content::BrowserContext::GetDownloadManager(profile);
 }