Rewrite std::string("") to std::string(), Linux edition.

chrome/browser/ui/webui/downloads_dom_handler_browsertest.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 "base/auto_reset.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/json/json_reader.h"
 #include "base/prefs/pref_service.h"
 #include "base/values.h"
 #include "chrome/browser/history/download_row.h"
@@ skipping 129 matching lines @@
   MockDownloadsDOMHandler mddh(download_manager());
 
   GURL url = test_server()->GetURL("files/downloads/image.jpg");
   std::vector<GURL> url_chain;
   url_chain.push_back(url);
   base::Time current(base::Time::Now());
   download_manager()->CreateDownloadItem(
       base::FilePath(FILE_PATH_LITERAL("/path/to/file")),
       base::FilePath(FILE_PATH_LITERAL("/path/to/file")),
       url_chain,
-      GURL(""),
+      GURL(std::string()),
       current,
       current,
       128,
       128,
       content::DownloadItem::COMPLETE,
       content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS,
       content::DOWNLOAD_INTERRUPT_REASON_NONE,
       false);
 
   mddh.WaitForDownloadsList();
@@ skipping 27 matching lines @@
 // TODO(benjhayden): Test incognito, both downloads_list() and that on-record
 // calls can't access off-record items.
 
 // TODO(benjhayden): Test that bad download ids incoming from the javascript are
 // dropped on the floor.
 
 // TODO(benjhayden): Test that IsTemporary() downloads are not shown.
 
 // TODO(benjhayden): Test that RemoveObserver is called on all download items,
 // including items that crossed IsTemporary() and back.