[Sync] Convert DTCs to be not RefCounted and NonThreadSafe.

chrome/browser/sync/glue/extension_setting_data_type_controller.cc

Index: chrome/browser/sync/glue/extension_setting_data_type_controller.cc
diff --git a/chrome/browser/sync/glue/extension_setting_data_type_controller.cc b/chrome/browser/sync/glue/extension_setting_data_type_controller.cc
index 0c1268b01dc422d115cd4d60e3e0b7f5002ec776..51b26f276333290495c41cf3aa824d39e9b81a00 100644
--- a/chrome/browser/sync/glue/extension_setting_data_type_controller.cc
+++ b/chrome/browser/sync/glue/extension_setting_data_type_controller.cc
@@ -19,23 +19,14 @@ namespace browser_sync {
 
 ExtensionSettingDataTypeController::ExtensionSettingDataTypeController(
     syncer::ModelType type,
-    const base::Closure& error_callback,
+    const base::Closure& dump_stack,
     sync_driver::SyncClient* sync_client,
     Profile* profile)
-    : NonUIDataTypeController(
-          BrowserThread::GetTaskRunnerForThread(BrowserThread::UI),
-          error_callback,
-          sync_client),
-      type_(type),
+    : NonUIDataTypeController(type, dump_stack, sync_client),
       profile_(profile) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK(type == syncer::EXTENSION_SETTINGS || type == syncer::APP_SETTINGS);
 }
 
-syncer::ModelType ExtensionSettingDataTypeController::type() const {
-  return type_;
-}
-
 syncer::ModelSafeGroup
 ExtensionSettingDataTypeController::model_safe_group() const {
   return syncer::GROUP_FILE;
@@ -46,12 +37,12 @@ ExtensionSettingDataTypeController::~ExtensionSettingDataTypeController() {}
 bool ExtensionSettingDataTypeController::PostTaskOnBackendThread(
     const tracked_objects::Location& from_here,
     const base::Closure& task) {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(CalledOnValidThread());
   return BrowserThread::PostTask(BrowserThread::FILE, from_here, task);
 }
 
 bool ExtensionSettingDataTypeController::StartModels() {
-  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(CalledOnValidThread());
   extensions::ExtensionSystem::Get(profile_)->InitForRegularProfile(true);
   return true;
 }