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

chrome/browser/automation/automation_misc_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 <string>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "chrome/browser/automation/automation_provider_observers.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 64 matching lines @@
       browser()->tab_strip_model()->GetActiveWebContents()->GetRenderViewHost();
   ASSERT_TRUE(content::ExecuteScript(
       view,
       "window.didClick = false;"
       "document.body.innerHTML ="
       "    '<a style=\\'position:absolute; left:0; top:0\\'>link</a>';"
       "document.querySelector('a').addEventListener('click', function() {"
       "  window.didClick = true;"
       "}, true);"));
   AutomationMouseEvent automation_event;
-  automation_event.location_script_chain.push_back(
-      ScriptEvaluationRequest("{'x': 5, 'y': 10}", ""));
+  automation_event.location_script_chain
+      .push_back(ScriptEvaluationRequest("{'x': 5, 'y': 10}", std::string()));
   WebKit::WebMouseEvent& mouse_event = automation_event.mouse_event;
   mouse_event.type = WebKit::WebInputEvent::MouseDown;
   mouse_event.button = WebKit::WebMouseEvent::ButtonLeft;
   mouse_event.clickCount = 1;
   new AutomationMouseEventProcessor(
       view, automation_event, mock.completion_callback(),
       mock.error_callback());
   mouse_event.type = WebKit::WebInputEvent::MouseUp;
   new AutomationMouseEventProcessor(
       view, automation_event, mock.completion_callback(),
       mock.error_callback());
 
   bool did_click = false;
   ASSERT_TRUE(content::ExecuteScriptAndExtractBool(
       view,
       "window.domAutomationController.send(window.didClick);",
       &did_click));
   EXPECT_TRUE(did_click);
 }