Device robot refresh token integrity validation.

chrome/service/cloud_print/cloud_print_auth.cc

Index: chrome/service/cloud_print/cloud_print_auth.cc
diff --git a/chrome/service/cloud_print/cloud_print_auth.cc b/chrome/service/cloud_print/cloud_print_auth.cc
index 9bc820c71cf3a233fcde5e98d797fd6e953f9f91..5abfb997e7ee544058b736acb9cc2f507ae6da45 100644
--- a/chrome/service/cloud_print/cloud_print_auth.cc
+++ b/chrome/service/cloud_print/cloud_print_auth.cc
@@ -62,7 +62,6 @@ void CloudPrintAuth::AuthenticateWithRobotAuthCode(
   robot_email_ = robot_email;
   // Now that we have an auth code we need to get the refresh and access tokens.
   oauth_client_.reset(new gaia::GaiaOAuthClient(
-      GaiaUrls::GetInstance()->oauth2_token_url(),
       g_service_process->GetServiceURLRequestContextGetter()));
   oauth_client_->GetTokensFromAuthCode(oauth_client_info_,
                                        robot_oauth_auth_code,
@@ -72,10 +71,11 @@ void CloudPrintAuth::AuthenticateWithRobotAuthCode(
 
 void CloudPrintAuth::RefreshAccessToken() {
   oauth_client_.reset(new gaia::GaiaOAuthClient(
-      GaiaUrls::GetInstance()->oauth2_token_url(),
       g_service_process->GetServiceURLRequestContextGetter()));
+  std::vector<std::string> empty_scope_list;  // (Use scope from refresh token.)
   oauth_client_->RefreshToken(oauth_client_info_,
                               refresh_token_,
+                              empty_scope_list,
                               kCloudPrintAuthMaxRetryCount,
                               this);
 }
@@ -139,7 +139,6 @@ CloudPrintURLFetcher::ResponseAction CloudPrintAuth::HandleJSONData(
   json_data->GetString(kXMPPJidValue, &robot_email_);
   // Now that we have an auth code we need to get the refresh and access tokens.
   oauth_client_.reset(new gaia::GaiaOAuthClient(
-      GaiaUrls::GetInstance()->oauth2_token_url(),
       g_service_process->GetServiceURLRequestContextGetter()));
   oauth_client_->GetTokensFromAuthCode(oauth_client_info_,
                                        auth_code,