AU: pass whether or not we can tolerate a delta to the server

omaha_request_action.cc

Index: omaha_request_action.cc
diff --git a/omaha_request_action.cc b/omaha_request_action.cc
index 9d53a4ea63699fbb7dcc5af2867f88d3125b404c..6f9a7900f4696a462948f564ac3d1bd4c48bc866 100644
--- a/omaha_request_action.cc
+++ b/omaha_request_action.cc
@@ -88,7 +88,8 @@ string FormatRequest(const OmahaEvent* event,
       XmlEncode(params.app_version) + "\" "
       "lang=\"" + XmlEncode(params.app_lang) + "\" track=\"" +
       XmlEncode(params.app_track) + "\" board=\"" +
-      XmlEncode(params.os_board) + "\">\n" + body +
+      XmlEncode(params.os_board) + "\" delta_okay=\"" +
+      (params.delta_okay ? "true" : "false") + "\">\n" + body +
       "    </o:app>\n"
       "</o:gupdate>\n";
 }