[Sync] Plumb initial type set from engine to DTM.

components/sync/driver/glue/sync_backend_host_impl_unittest.cc

Index: components/sync/driver/glue/sync_backend_host_impl_unittest.cc
diff --git a/components/sync/driver/glue/sync_backend_host_impl_unittest.cc b/components/sync/driver/glue/sync_backend_host_impl_unittest.cc
index f615bb0464618973580ddd91a7f14d1bdc043272..5276ddb3d58964ea8925e0f96fb3700ecd9e00e6 100644
--- a/components/sync/driver/glue/sync_backend_host_impl_unittest.cc
+++ b/components/sync/driver/glue/sync_backend_host_impl_unittest.cc
@@ -75,8 +75,9 @@ class MockSyncEngineHost : public SyncEngineHost {
  public:
   virtual ~MockSyncEngineHost() {}
 
-  MOCK_METHOD4(OnEngineInitialized,
-               void(const WeakHandle<JsBackend>&,
+  MOCK_METHOD5(OnEngineInitialized,
+               void(ModelTypeSet initial_types,
+                    const WeakHandle<JsBackend>&,
                     const WeakHandle<DataTypeDebugInfoListener>&,
                     const std::string&,
                     bool));
@@ -205,7 +206,7 @@ class SyncEngineTest : public testing::Test {
 
   // Synchronously initializes the backend.
   void InitializeBackend(bool expect_success) {
-    EXPECT_CALL(mock_host_, OnEngineInitialized(_, _, _, expect_success))
+    EXPECT_CALL(mock_host_, OnEngineInitialized(_, _, _, _, expect_success))
         .WillOnce(InvokeWithoutArgs(QuitMessageLoop));
     SyncEngine::HttpPostProviderFactoryGetter
         http_post_provider_factory_getter =