Add Store+Sync to reading list.

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 2c15aafe5be1a671f6dc3fdf146cb500be9ed0ca..b2c9a89826129c1c53d6925853754936042b9e06 100644
--- a/components/browser_sync/profile_sync_components_factory_impl.cc
+++ b/components/browser_sync/profile_sync_components_factory_impl.cc
@@ -282,6 +282,14 @@ void ProfileSyncComponentsFactoryImpl::RegisterCommonDataTypes(
         base::MakeUnique<UIDataTypeController>(syncer::ARTICLES, error_callback,
                                                sync_client_));
   }
+  // Reading list sync is enabled by default.  Register unless explicitly
+  // disabled.
+  if (!disabled_types.Has(syncer::READING_LIST)) {
+    sync_service->RegisterDataTypeController(
+        base::MakeUnique<ModelTypeController>(
+            syncer::READING_LIST, base::Bind(&base::debug::DumpWithoutCrashing),
+            sync_client_, base::ThreadTaskRunnerHandle::Get()));
+  }
 }
 
 DataTypeManager* ProfileSyncComponentsFactoryImpl::CreateDataTypeManager(