favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/chromeos/

chrome/browser/chromeos/drive/download_handler.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/chromeos/drive/download_handler.h"
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/supports_user_data.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 228 matching lines @@
   if (!manager)
     return;
   DownloadItem* download = manager->GetDownload(id);
   if (!download)
     return;
   download->Remove();
 }
 
 void DownloadHandler::OnDownloadUpdated(
     DownloadManager* manager, DownloadItem* download) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   // Only accept downloads that have the Drive meta data associated with them.
   DriveUserData* data = GetDriveUserData(download);
   if (!drive_tmp_download_path_.IsParent(download->GetTargetFilePath()) ||
       !data ||
       data->is_complete())
     return;
 
   switch (download->GetState()) {
     case DownloadItem::IN_PROGRESS:
@@ skipping 73 matching lines @@
 
 DownloadManager* DownloadHandler::GetDownloadManager(void* manager_id) {
   if (manager_id == notifier_->GetManager())
     return notifier_->GetManager();
   if (notifier_incognito_ && manager_id == notifier_incognito_->GetManager())
     return notifier_incognito_->GetManager();
   return NULL;
 }
 
 }  // namespace drive