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

components/history/core/browser/typed_url_data_type_controller.h

Index: components/history/core/browser/typed_url_data_type_controller.h
diff --git a/components/history/core/browser/typed_url_data_type_controller.h b/components/history/core/browser/typed_url_data_type_controller.h
index 92dd02760aee14d398b3dad37b179a8a625d5a8d..9d51bbf3645a1014c34dfa63f866004f7d70195a 100644
--- a/components/history/core/browser/typed_url_data_type_controller.h
+++ b/components/history/core/browser/typed_url_data_type_controller.h
@@ -26,35 +26,27 @@ class ControlTask;
 // A class that manages the startup and shutdown of typed_url sync.
 class TypedUrlDataTypeController : public sync_driver::NonUIDataTypeController {
  public:
-  explicit TypedUrlDataTypeController(
-      const scoped_refptr<base::SingleThreadTaskRunner>& ui_thread,
-      const base::Closure& error_callback,
-      sync_driver::SyncClient* sync_client,
-      const char* history_disabled_pref_name);
+  // |dump_stack| is called when an unrecoverable error occurs.
+  TypedUrlDataTypeController(const base::Closure& dump_stack,
+                             sync_driver::SyncClient* sync_client,
+                             const char* history_disabled_pref_name);
+  ~TypedUrlDataTypeController() override;
 
   // NonUIDataTypeController implementation
-  syncer::ModelType type() const override;
   syncer::ModelSafeGroup model_safe_group() const override;
   bool ReadyForStart() const override;
 
-  // Invoked on the history thread to set our history backend - must be called
-  // before CreateSyncComponents() is invoked.
-  void SetBackend(history::HistoryBackend* backend);
-
  protected:
   // NonUIDataTypeController interface.
   bool PostTaskOnBackendThread(const tracked_objects::Location& from_here,
                                const base::Closure& task) override;
 
  private:
-  ~TypedUrlDataTypeController() override;
-
   void OnSavingBrowserHistoryDisabledChanged();
 
   // Name of the pref that indicates whether saving history is disabled.
   const char* history_disabled_pref_name_;
 
-  history::HistoryBackend* backend_;
   PrefChangeRegistrar pref_registrar_;
 
   // Helper object to make sure we don't leave tasks running on the history