[sync] skeleton implementation of AutocompleteSyncBridge

components/browser_sync/profile_sync_components_factory_impl.cc

Index: components/browser_sync/profile_sync_components_factory_impl.cc
diff --git a/components/browser_sync/profile_sync_components_factory_impl.cc b/components/browser_sync/profile_sync_components_factory_impl.cc
index c4332e02bdc969cd0fa5b05a11bd7e5b61822f33..3715d1e605c5d67bdbc6352f990f3522e5fca297 100644
--- a/components/browser_sync/profile_sync_components_factory_impl.cc
+++ b/components/browser_sync/profile_sync_components_factory_impl.cc
@@ -155,9 +155,16 @@ void ProfileSyncComponentsFactoryImpl::RegisterCommonDataTypes(
   // Autofill sync is enabled by default.  Register unless explicitly

[Mathieu, 2016/11/23 12:47:21]

I wish this was called "Autocomplete" now. What we think of Autofill is
"Autofill profile", below. Can you add a comment?

[Patrick Noland, 2016/11/29 00:09:50]

Done.

   // disabled.
   if (!disabled_types.Has(syncer::AUTOFILL)) {
-    sync_service->RegisterDataTypeController(
-        base::MakeUnique<AutofillDataTypeController>(
-            db_thread_, error_callback, sync_client_, web_data_service_));
+    if (base::FeatureList::IsEnabled(switches::kSyncUSSAutocomplete)) {
+      sync_service->RegisterDataTypeController(
+          base::MakeUnique<ModelTypeController>(
+              syncer::AUTOFILL, base::Bind(&base::debug::DumpWithoutCrashing),
+              sync_client_, db_thread_));
+    } else {
+      sync_service->RegisterDataTypeController(
+          base::MakeUnique<AutofillDataTypeController>(
+              db_thread_, error_callback, sync_client_, web_data_service_));
+    }
   }
 
   // Autofill profile sync is enabled by default.  Register unless explicitly