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

chrome/browser/printing/print_dialog_cloud_interative_uitest.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/print_dialog_cloud.h"
 #include "chrome/browser/printing/print_dialog_cloud_internal.h"
 
 #include <functional>
 
 #include "base/bind.h"
@@ skipping 233 matching lines @@
   if (request &&
       (request->url() == TestController::GetInstance()->expected_url())) {
     if (TestController::GetInstance()->use_delegate())
       request->set_delegate(TestController::GetInstance()->delegate());
     TestController::GetInstance()->set_result(true);
     return new SimpleTestJob(request, network_delegate);
   }
   return new net::URLRequestTestJob(request,
                                     network_delegate,
                                     net::URLRequestTestJob::test_headers(),
-                                    "",
+                                    std::string(),
                                     true);
 }
 
 IN_PROC_BROWSER_TEST_F(PrintDialogCloudTest, HandlersRegistered) {
   AddTestHandlers();
 
   TestController::GetInstance()->set_use_delegate(true);
 
   content::RunMessageLoop();
 
@@ skipping 10 matching lines @@
   BrowserWindow* window = browser()->window();
   ASSERT_TRUE(window);
   gfx::NativeWindow native_window = window->GetNativeWindow();
   ASSERT_TRUE(native_window);
   bool key_sent = ui_controls::SendKeyPress(native_window, ui::VKEY_ESCAPE,
                                             false, false, false, false);
   EXPECT_TRUE(key_sent);
   if (key_sent)
     tab_closed_observer.Wait();
 }