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

chrome/browser/chromeos/login/signin/oauth2_browsertest.cc

Index: chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
diff --git a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
index d474bf4350f174cd5bff3ae89f2e2e7486bc4ea4..48bdb7b6edf34d9362615f1210ab0c57eafce2cd 100644
--- a/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
+++ b/chrome/browser/chromeos/login/signin/oauth2_browsertest.cc
@@ -621,15 +621,13 @@ class MergeSessionTest : public OAuth2Test {
 
     // Get fake URL for fake google.com.
     const GURL& server_url = embedded_test_server()->base_url();
-    std::string google_host("www.google.com");
     GURL::Replacements replace_google_host;
-    replace_google_host.SetHostStr(google_host);
+    replace_google_host.SetHostStr("www.google.com");
     GURL google_url = server_url.ReplaceComponents(replace_google_host);
     fake_google_page_url_ = google_url.Resolve(kHelloPagePath);
 
-    std::string non_google_host("www.somethingelse.org");
     GURL::Replacements replace_non_google_host;
-    replace_non_google_host.SetHostStr(non_google_host);
+    replace_non_google_host.SetHostStr("www.somethingelse.org");
     GURL non_google_url = server_url.ReplaceComponents(replace_non_google_host);
     non_google_page_url_ = non_google_url.Resolve(kRandomPagePath);
 }