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

chrome/browser/printing/print_dialog_cloud_unittest.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 <string>
 #include <vector>
 
@@ skipping 252 matching lines @@
   base::FilePath test_data_file_name = GetTestDataFileName();
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&CloudPrintDataSender::SendPrintData, print_data_sender));
   MessageLoop::current()->RunUntilIdle();
 }
 
 TEST_F(CloudPrintDataSenderTest, EmptyData) {
   EXPECT_CALL(*mock_helper_, CallJavascriptFunction(_, _, _)).Times(0);
 
-  std::string data("");
+  std::string data;
   scoped_refptr<CloudPrintDataSender> print_data_sender(
       CreateSender(base::RefCountedString::TakeString(&data)));
   base::FilePath test_data_file_name = GetTestDataFileName();
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&CloudPrintDataSender::SendPrintData, print_data_sender));
   MessageLoop::current()->RunUntilIdle();
 }
 
 // Testing for CloudPrintFlowHandler needs a mock
@@ skipping 57 matching lines @@
   std::vector<WebUIMessageHandler*> handlers;
   delegate_->GetWebUIMessageHandlers(&handlers);
   delegate_.reset();
   EXPECT_THAT(mock_flow_handler_.get(), NotNull());
 }
 
 // Testing for ExternalWebDialogUI needs a mock WebContents and mock
 // CloudPrintWebDialogDelegate (attached to the mock web_contents).
 
 // Testing for PrintDialogCloud needs a mock Browser.