GURL::Replacements methods accept a StringPiece instead of std::string&.

chrome/browser/extensions/extension_nacl_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/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/crx_installer.h"
@@ skipping 188 matching lines @@
       PLUGIN_TYPE_CONTENT_HANDLER);
 }
 
 // Test that NaCl plugin isn't blocked for hosted app URLs.
 IN_PROC_BROWSER_TEST_F(NaClExtensionTest, HostedApp) {
   host_resolver()->AddRule("*", "127.0.0.1");
   ASSERT_TRUE(test_server()->Start());
 
   GURL url = test_server()->GetURL("files/extensions/native_client/test.html");
   GURL::Replacements replace_host;
-  std::string host_str("localhost");
-  replace_host.SetHostStr(host_str);
+  replace_host.SetHostStr("localhost");
   replace_host.ClearPort();
   url = url.ReplaceComponents(replace_host);
 
   const Extension* extension = InstallHostedApp();
   ASSERT_TRUE(extension);
   CheckPluginsCreated(url, PLUGIN_TYPE_ALL);
 }
 
 }  // namespace