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

chrome/browser/extensions/subscribe_page_action_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 "chrome/browser/extensions/extension_browsertest.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 96 matching lines @@
                                const std::string& expected_error) {
   if (sniff_xml_type) {
     // TODO(finnur): Implement this is a non-flaky way.
   }
 
   // Navigate to the subscribe page directly.
   ui_test_utils::NavigateToURL(browser,
                                GetFeedUrl(server, url, true, extension_id));
 
   WebContents* tab = browser->tab_strip_model()->GetActiveWebContents();
-  ASSERT_TRUE(ValidatePageElement(tab,
-                                  "",
-                                  kScriptFeedTitle,
-                                  expected_feed_title));
+  ASSERT_TRUE(ValidatePageElement(
+      tab, std::string(), kScriptFeedTitle, expected_feed_title));
   ASSERT_TRUE(ValidatePageElement(tab,
                                   "//html/body/div/iframe[1]",
                                   kScriptAnchor,
                                   expected_item_title));
   ASSERT_TRUE(ValidatePageElement(tab,
                                   "//html/body/div/iframe[1]",
                                   kScriptDesc,
                                   expected_item_desc));
   ASSERT_TRUE(ValidatePageElement(tab,
                                   "//html/body/div/iframe[1]",
@@ skipping 209 matching lines @@
   std::string id = extension->id();
 
   // Valid feed but containing no links.
   NavigateToFeedAndValidate(
       test_server(), kValidFeedNoLinks, browser(), id, true,
       "Feed for MyFeedTitle",
       "Title with no link",
       "Desc",
       "No error");
 }