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

chrome/browser/extensions/extension_dom_clipboard_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/strings/stringprintf.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 27 matching lines @@
 
   if (!LoadExtension(test_data_dir_.AppendASCII("clipboard")
                                    .AppendASCII(app_name))) {
     message_ = "Failed to load hosted app.";
     return false;
   }
 
   GURL base_url = embedded_test_server()->GetURL(
       "/extensions/api_test/clipboard/");
   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");
   base_url = base_url.ReplaceComponents(replace_host);
 
   std::string launch_page_path =
       base::StringPrintf("%s/%s", app_name.c_str(), launch_page.c_str());
   ui_test_utils::NavigateToURL(browser(), base_url.Resolve(launch_page_path));
 
   return true;
 }
 
 bool ClipboardApiTest::ExecuteCopyInSelectedTab() {
@@ skipping 52 matching lines @@
 IN_PROC_BROWSER_TEST_F(ClipboardApiTest, HostedAppNoPermission) {
   ASSERT_TRUE(LoadHostedApp("hosted_app_no_permission", "main.html"))
       << message_;
 
   EXPECT_FALSE(ExecuteCopyInSelectedTab()) << message_;
   EXPECT_FALSE(ExecutePasteInSelectedTab()) << message_;
   EXPECT_FALSE(ExecuteCommandInIframeInSelectedTab("copy")) << message_;
   EXPECT_FALSE(ExecuteCommandInIframeInSelectedTab("paste")) << message_;
 }