Add data usage tracking for GAIA auth api and GCM engine service

components/data_use_measurement/core/data_use_user_data.cc

Index: components/data_use_measurement/core/data_use_user_data.cc
diff --git a/components/data_use_measurement/core/data_use_user_data.cc b/components/data_use_measurement/core/data_use_user_data.cc
index a272226db33e56573fed5fbdac6a6220308be52e..12cfc24160a4231c014f63140829337307cd2048 100644
--- a/components/data_use_measurement/core/data_use_user_data.cc
+++ b/components/data_use_measurement/core/data_use_user_data.cc
@@ -92,6 +92,10 @@ std::string DataUseUserData::GetServiceNameAsString(ServiceName service_name) {
       return "TracingUploader";
     case DOM_DISTILLER:
       return "DOMDistiller";
+    case GAIA_AUTH_FETCHER:
+      return "GAIAAuthFetcher";
+    case GCM_ENGINE:
+      return "GCMEngine";
   }
   return "INVALID";
 }