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

content/test/browser_test_utils_browsertest.cc

 // Copyright 2014 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 "content/public/browser/resource_request_details.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "net/dns/mock_host_resolver.h"
@@ skipping 52 matching lines @@
   // http://foo.com:<port>/title2.html
   NavigationObserver observer(shell()->web_contents());
   NavigateToURL(
       shell(),
       embedded_test_server()->GetURL("/cross-site/foo.com/title2.html"));
 
   // The expectation is that the cross-site redirector will take the
   // hostname supplied in the URL and rewrite the URL. Build the
   // expected URL to ensure navigation was properly redirected.
   GURL::Replacements replace_host;
-  std::string foo_com("foo.com");
   GURL expected_url(embedded_test_server()->GetURL("/title2.html"));
-  replace_host.SetHostStr(foo_com);
+  replace_host.SetHostStr("foo.com");
   expected_url = expected_url.ReplaceComponents(replace_host);
 
   EXPECT_EQ(expected_url, observer.navigation_url());
   EXPECT_EQ(observer.redirect_url(), observer.navigation_url());
 }
 
 }  // namespace content