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

chrome/browser/sessions/session_restore_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 "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/defaults.h"
@@ skipping 967 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(SessionRestoreTest, SessionStorageAfterTabReplace) {
   // Simulate what prerendering does: create a new WebContents with the same
   // SessionStorageNamespace as an existing tab, then replace the tab with it.
   {
     content::NavigationController* controller =
         &browser()->tab_strip_model()->GetActiveWebContents()->GetController();
     ASSERT_TRUE(controller->GetDefaultSessionStorageNamespace());
 
     content::SessionStorageNamespaceMap session_storage_namespace_map;
-    session_storage_namespace_map[""] =
+    session_storage_namespace_map[std::string()] =
         controller->GetDefaultSessionStorageNamespace();
     scoped_ptr<content::WebContents> web_contents(
         content::WebContents::CreateWithSessionStorage(
             content::WebContents::CreateParams(browser()->profile()),
             session_storage_namespace_map));
 
     TabStripModel* tab_strip_model = browser()->tab_strip_model();
     scoped_ptr<content::WebContents> old_web_contents(
         tab_strip_model->ReplaceWebContentsAt(
             tab_strip_model->active_index(), web_contents.release()));
     // Navigate with the new tab.
     ui_test_utils::NavigateToURL(browser(), url2_);
     // old_web_contents goes out of scope.
   }
 
   // Check that the sessionStorage data is going to be persisted.
   content::NavigationController* controller =
       &browser()->tab_strip_model()->GetActiveWebContents()->GetController();
   EXPECT_TRUE(
       controller->GetDefaultSessionStorageNamespace()->should_persist());
 
   // Quit and restore. Check that no extra tabs were created.
   Browser* new_browser = QuitBrowserAndRestore(browser(), 1);
   ASSERT_EQ(1u, native_browser_list->size());
   EXPECT_EQ(1, new_browser->tab_strip_model()->count());
 }