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

chrome/browser/printing/cloud_print/cloud_print_setup_flow.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/printing/cloud_print/cloud_print_setup_flow.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/singleton.h"
 #include "base/prefs/pref_service.h"
 #include "base/string_util.h"
@@ skipping 48 matching lines @@
 // static
 CloudPrintSetupFlow* CloudPrintSetupFlow::OpenDialog(
     Profile* profile,
     const base::WeakPtr<Delegate>& delegate,
     gfx::NativeWindow parent_window) {
   DCHECK(profile);
   Browser* browser = chrome::FindLastActiveWithProfile(profile,
       chrome::GetActiveDesktop());
   // Set the arguments for showing the gaia login page.
   DictionaryValue args;
-  args.SetString("user", "");
+  args.SetString("user", std::string());
   args.SetInteger("error", 0);
   args.SetBoolean("editable_user", true);
 
   bool setup_done = false;
   if (profile->GetPrefs()->HasPrefPath(prefs::kCloudPrintEmail) &&
       !profile->GetPrefs()->GetString(prefs::kCloudPrintEmail).empty())
     setup_done = true;
   args.SetString("pageToShow", setup_done ? "setupdone" : "cloudprintsetup");
 
   std::string json_args;
@@ skipping 254 matching lines @@
 
 void CloudPrintSetupFlow::ExecuteJavascriptInIFrame(
     const string16& iframe_xpath,
     const string16& js) {
   if (web_ui_) {
     content::RenderViewHost* rvh =
         web_ui_->GetWebContents()->GetRenderViewHost();
     rvh->ExecuteJavascriptInWebFrame(iframe_xpath, js);
   }
 }