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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..79f5f6e236890ab787bb73763aca6c0ffaf358f2 100644
--- a/components/browser_sync/profile_sync_components_factory_impl.cc
+++ b/components/browser_sync/profile_sync_components_factory_impl.cc
@@ -282,6 +282,13 @@ void ProfileSyncComponentsFactoryImpl::RegisterCommonDataTypes(
         base::MakeUnique<UIDataTypeController>(syncer::ARTICLES, error_callback,
                                                sync_client_));
   }
+  // Article sync is disabled by default.  Register only if explicitly enabled.
+  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(