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

chrome/browser/apps/app_browsertest.cc

 // Copyright 2013 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 "apps/launcher.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/prefs/pref_service.h"
@@ skipping 393 matching lines @@
 }
 
 // Tests that platform apps have isolated storage by default.
 IN_PROC_BROWSER_TEST_F(PlatformAppBrowserTest, Isolation) {
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   // Load a (non-app) page under the "localhost" origin that sets a cookie.
   GURL set_cookie_url = embedded_test_server()->GetURL(
       "/extensions/platform_apps/isolation/set_cookie.html");
   GURL::Replacements replace_host;
-  std::string host_str("localhost");  // Must stay in scope with replace_host.
-  replace_host.SetHostStr(host_str);
+  replace_host.SetHostStr("localhost");
   set_cookie_url = set_cookie_url.ReplaceComponents(replace_host);
 
   ui_test_utils::NavigateToURL(browser(), set_cookie_url);
 
   // Make sure the cookie is set.
   int cookie_size;
   std::string cookie_value;
   ui_test_utils::GetCookies(
       set_cookie_url,
       browser()->tab_strip_model()->GetWebContentsAt(0),
@@ skipping 908 matching lines @@
   // Now check that the app window's default zoom, and actual zoom level,
   // have not been changed from the default.
   WebContents* web_contents = GetFirstAppWindowWebContents();
   content::HostZoomMap* app_host_zoom_map = content::HostZoomMap::Get(
       web_contents->GetSiteInstance());
   EXPECT_EQ(0, app_host_zoom_map->GetDefaultZoomLevel());
   EXPECT_EQ(0, app_host_zoom_map->GetZoomLevel(web_contents));
 }
 
 }  // namespace extensions