Convert //chrome from scoped_ptr to std::unique_ptr

chrome/service/cloud_print/cloud_print_url_fetcher.cc

Index: chrome/service/cloud_print/cloud_print_url_fetcher.cc
diff --git a/chrome/service/cloud_print/cloud_print_url_fetcher.cc b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
index ef937359f774999ce9dbb2c97bcc3b6ea121cb65..9ccf523e140e122806624125a2a7344294d054ce 100644
--- a/chrome/service/cloud_print/cloud_print_url_fetcher.cc
+++ b/chrome/service/cloud_print/cloud_print_url_fetcher.cc
@@ -202,7 +202,7 @@ void CloudPrintURLFetcher::OnURLFetchComplete(
       // response, we will retry (to handle the case where we got redirected
       // to a non-cloudprint-server URL eg. for authentication).
       bool succeeded = false;
-      scoped_ptr<base::DictionaryValue> response_dict =
+      std::unique_ptr<base::DictionaryValue> response_dict =
           ParseResponseJSON(data, &succeeded);
 
       if (response_dict) {