sync: Count and report reflected updates

sync/sessions/status_controller.cc

Index: sync/sessions/status_controller.cc
diff --git a/sync/sessions/status_controller.cc b/sync/sessions/status_controller.cc
index 2ae1a961ef6f0ac8167239d52f6b81f3c107a0a9..5a7bd305a1c414414ad888f8d709eb5b878a2f97 100644
--- a/sync/sessions/status_controller.cc
+++ b/sync/sessions/status_controller.cc
@@ -116,6 +116,12 @@ void StatusController::increment_num_tombstone_updates_downloaded_by(
       value;
 }
 
+void StatusController::increment_num_echo_updates_downloaded_by(
+    int value) {
+  shared_.syncer_status.mutate()->num_echo_updates_downloaded_total +=
+      value;
+}
+
 void StatusController::set_num_server_changes_remaining(
     int64 changes_remaining) {
   if (shared_.num_server_changes_remaining.value() != changes_remaining)