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

chrome/browser/sync/glue/theme_data_type_controller.h

Index: chrome/browser/sync/glue/theme_data_type_controller.h
diff --git a/chrome/browser/sync/glue/theme_data_type_controller.h b/chrome/browser/sync/glue/theme_data_type_controller.h
index 17a4251d2255e15c527797a9c95986d75bd23b34..25a438fd4915e75e238bca539f6957f6fdc12916 100644
--- a/chrome/browser/sync/glue/theme_data_type_controller.h
+++ b/chrome/browser/sync/glue/theme_data_type_controller.h
@@ -14,13 +14,13 @@ namespace browser_sync {
 
 class ThemeDataTypeController : public sync_driver::UIDataTypeController {
  public:
-  ThemeDataTypeController(const base::Closure& error_callback,
+  // |dump_stack| is called when an unrecoverable error occurs.
+  ThemeDataTypeController(const base::Closure& dump_stack,
                           sync_driver::SyncClient* sync_client,
                           Profile* profile);
-
- private:
   ~ThemeDataTypeController() override;
 
+ private:
   // UIDataTypeController implementations.
   bool StartModels() override;