sync: Report GetUpdate triggers to the server

sync/sessions/sync_session.cc

Index: sync/sessions/sync_session.cc
diff --git a/sync/sessions/sync_session.cc b/sync/sessions/sync_session.cc
index 2e82dae0f3110965a568c56a22b4a9283c89bd5d..3adb3d9242058a7e5fb4266b75afb46c3f0f37ba 100644
--- a/sync/sessions/sync_session.cc
+++ b/sync/sessions/sync_session.cc
@@ -21,7 +21,20 @@ SyncSession::SyncSession(
     const SyncSourceInfo& source)
     : context_(context),
       source_(source),
-      delegate_(delegate) {
+      delegate_(delegate),
+      nudge_tracker_(NULL) {
+  status_controller_.reset(new StatusController());
+}
+
+SyncSession::SyncSession(
+    SyncSessionContext* context,
+    Delegate* delegate,
+    const SyncSourceInfo& source,
+    const NudgeTracker* nudge_tracker)
+    : context_(context),
+      source_(source),
+      delegate_(delegate),
+      nudge_tracker_(nudge_tracker) {
   status_controller_.reset(new StatusController());
 }