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

chrome/browser/extensions/content_script_apitest.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/bind.h"
 #include "base/callback.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/api/permissions/permissions_api.h"
 #include "chrome/browser/extensions/extension_apitest.h"
@@ skipping 320 matching lines @@
       embedded_test_server()->GetURL("/extensions/test_file_with_body.html");
   EXPECT_TRUE(CheckStyleInjection(browser(), url, true));
 
   // The loaded extension has an exclude match for "extensions/test_file.html",
   // so no CSS should be injected.
   url = embedded_test_server()->GetURL("/extensions/test_file.html");
   EXPECT_TRUE(CheckStyleInjection(browser(), url, false));
 
   // We disallow all injection on the webstore.
   GURL::Replacements replacements;
-  std::string host(kWebstoreDomain);
-  replacements.SetHostStr(host);
+  replacements.SetHostStr(kWebstoreDomain);
   url = embedded_test_server()->GetURL("/extensions/test_file_with_body.html")
             .ReplaceComponents(replacements);
   EXPECT_TRUE(CheckStyleInjection(browser(), url, false));
 }
 
 // crbug.com/120762
 IN_PROC_BROWSER_TEST_F(
     ExtensionApiTest,
     DISABLED_ContentScriptStylesInjectedIntoExistingRenderers) {
   ASSERT_TRUE(StartEmbeddedTestServer());
@@ skipping 208 matching lines @@
 
   // The extension will have injected at idle, but it should only inject once.
   EXPECT_TRUE(RunAllPending(web_contents));
   EXPECT_EQ(1u, dialog_helper.dialog_count());
   dialog_helper.CloseDialogs();
   EXPECT_TRUE(RunAllPending(web_contents));
   EXPECT_EQ(1u, dialog_helper.dialog_count());
 }
 
 }  // namespace extensions