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

chrome/browser/download/download_prefs.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/download/download_prefs.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 68 matching lines @@
 
 DownloadPrefs::~DownloadPrefs() {
 }
 
 // static
 void DownloadPrefs::RegisterUserPrefs(PrefRegistrySyncable* registry) {
   registry->RegisterBooleanPref(prefs::kPromptForDownload,
                                 false,
                                 PrefRegistrySyncable::SYNCABLE_PREF);
   registry->RegisterStringPref(prefs::kDownloadExtensionsToOpen,
-                               "",
+                               std::string(),
                                PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterBooleanPref(prefs::kDownloadDirUpgraded,
                                 false,
                                 PrefRegistrySyncable::UNSYNCABLE_PREF);
   registry->RegisterIntegerPref(prefs::kSaveFileType,
                                 content::SAVE_PAGE_TYPE_AS_COMPLETE_HTML,
                                 PrefRegistrySyncable::UNSYNCABLE_PREF);
 
   // The default download path is userprofile\download.
   const base::FilePath& default_download_path =
@@ skipping 103 matching lines @@
     extensions.erase(extensions.size() - 1);
 
   profile_->GetPrefs()->SetString(prefs::kDownloadExtensionsToOpen, extensions);
 }
 
 bool DownloadPrefs::AutoOpenCompareFunctor::operator()(
     const base::FilePath::StringType& a,
     const base::FilePath::StringType& b) const {
   return base::FilePath::CompareLessIgnoreCase(a, b);
 }