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

content/browser/renderer_host/render_process_host_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 "base/command_line.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/common/child_process_messages.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_process_host_observer.h"
 #include "content/public/browser/render_view_host.h"
@@ skipping 85 matching lines @@
   NavigateToURL(shell(), test_url);
   RenderProcessHost* rph =
       shell()->web_contents()->GetRenderViewHost()->GetProcess();
   // Make it believe it's a guest.
   reinterpret_cast<RenderProcessHostImpl*>(rph)->
       set_is_isolated_guest_for_testing(true);
   EXPECT_EQ(1, RenderProcessHostCount());
 
   // Navigate to a different page.
   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");
   GURL another_url = embedded_test_server()->GetURL("/simple_page.html");
   another_url = another_url.ReplaceComponents(replace_host);
   NavigateToURL(CreateBrowser(), another_url);
 
   // Expect that we got another process (the guest renderer was not reused).
   EXPECT_EQ(2, RenderProcessHostCount());
 }
 
 class ShellCloser : public RenderProcessHostObserver {
  public:
@@ skipping 112 matching lines @@
   GURL test_url = embedded_test_server()->GetURL("/simple_page.html");
   NavigateToURL(shell(), test_url);
 
   EXPECT_EQ(1, RenderProcessHostCount());
   EXPECT_EQ(0, process_exits_);
 }
 #endif
 
 }  // namespace
 }  // namespace content