sync: Report GetUpdate triggers to the server

sync/test/engine/syncer_command_test.h

Index: sync/test/engine/syncer_command_test.h
diff --git a/sync/test/engine/syncer_command_test.h b/sync/test/engine/syncer_command_test.h
index fa51d8221d2169fc9cfbaa31e6052e1e128d821d..eb9b5b76ffac8a1afb4730f723852a6d5edb02d9 100644
--- a/sync/test/engine/syncer_command_test.h
+++ b/sync/test/engine/syncer_command_test.h
@@ -107,9 +107,19 @@ class SyncerCommandTestBase : public testing::Test,
 
   // Create a session with the provided source.
   sessions::SyncSession* session(const sessions::SyncSourceInfo& source) {
-    if (!session_) {
+    // These sources require a valid nudge tracker.
+    DCHECK_NE(sync_pb::GetUpdatesCallerInfo::LOCAL, source.updates_source);
+    DCHECK_NE(sync_pb::GetUpdatesCallerInfo::NOTIFICATION,
+              source.updates_source);
+    DCHECK_NE(sync_pb::GetUpdatesCallerInfo::DATATYPE_REFRESH,
+              source.updates_source);
+    if (!session_.get()) {
       std::vector<ModelSafeWorker*> workers = GetWorkers();
-      session_.reset(new sessions::SyncSession(context(), delegate(), source));
+      session_.reset(
+          sessions::SyncSession::BuildForNonNudge(
+              context(),
+              delegate(),
+              source));
     }
     return session_.get();
   }