sync: Per-type update application

sync/internal_api/sync_manager_impl_unittest.cc

Index: sync/internal_api/sync_manager_impl_unittest.cc
diff --git a/sync/internal_api/sync_manager_impl_unittest.cc b/sync/internal_api/sync_manager_impl_unittest.cc
index 2a1129bb5014da3f52083397d3cad3232daaf826..91be3b80dfd588ceec1e24f4abca7f9398b6c482 100644
--- a/sync/internal_api/sync_manager_impl_unittest.cc
+++ b/sync/internal_api/sync_manager_impl_unittest.cc
@@ -66,6 +66,7 @@
 #include "sync/syncable/syncable_util.h"
 #include "sync/syncable/syncable_write_transaction.h"
 #include "sync/test/callback_counter.h"
+#include "sync/test/engine/fake_model_worker.h"
 #include "sync/test/engine/fake_sync_scheduler.h"
 #include "sync/test/engine/test_id_factory.h"
 #include "sync/test/fake_encryptor.h"
@@ -816,6 +817,12 @@ class SyncManagerTest : public testing::Test,
     ModelSafeRoutingInfo routing_info;
     GetModelSafeRoutingInfo(&routing_info);
 
+    // This works only because all routing info types are GROUP_PASSIVE.
+    // If we had types in other groups, we would need additional workers
+    // to support them.
+    scoped_refptr<ModelSafeWorker> worker = new FakeModelWorker(GROUP_PASSIVE);
+    workers.push_back(worker.get());
+
     // Takes ownership of |fake_invalidator_|.
     sync_manager_.Init(
         temp_dir_.path(),