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

components/sync/device_info/device_info_data_type_controller.h

Index: components/sync/device_info/device_info_data_type_controller.h
diff --git a/components/sync/device_info/device_info_data_type_controller.h b/components/sync/device_info/device_info_data_type_controller.h
index aa560856a1b7857c4e29d515c853fc34a60dce0d..b69df9895540ba423b04e2aab9428d95b992fb7d 100644
--- a/components/sync/device_info/device_info_data_type_controller.h
+++ b/components/sync/device_info/device_info_data_type_controller.h
@@ -17,15 +17,14 @@ namespace sync_driver {
 // DataTypeController for DEVICE_INFO model type.
 class DeviceInfoDataTypeController : public UIDataTypeController {
  public:
+  // |dump_stack| is called when an unrecoverable error occurs.
   DeviceInfoDataTypeController(
-      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
-      const base::Closure& error_callback,
+      const base::Closure& dump_stack,
       SyncClient* sync_client,
       LocalDeviceInfoProvider* local_device_info_provider);
-
- private:
   ~DeviceInfoDataTypeController() override;
 
+ private:
   // UIDataTypeController implementations.
   bool StartModels() override;
   void StopModels() override;