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

components/sync/core/data_type_error_handler.h

Index: components/sync/core/data_type_error_handler.h
diff --git a/components/sync/core/data_type_error_handler.h b/components/sync/core/data_type_error_handler.h
deleted file mode 100644
index dbac7d33f9e03c2aa8b5898e85108117bbaef390..0000000000000000000000000000000000000000
--- a/components/sync/core/data_type_error_handler.h
+++ /dev/null
@@ -1,38 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef COMPONENTS_SYNC_CORE_DATA_TYPE_ERROR_HANDLER_H__
-#define COMPONENTS_SYNC_CORE_DATA_TYPE_ERROR_HANDLER_H__
-
-#include <string>
-
-#include "base/location.h"
-
-#include "components/sync/api/sync_error.h"
-#include "components/sync/base/model_type.h"
-#include "components/sync/base/unrecoverable_error_handler.h"
-
-namespace syncer {
-
-class DataTypeErrorHandler {
- public:
-  // Call this to disable a datatype while it is running. This is usually
-  // called for a runtime failure that is specific to a datatype.
-  virtual void OnSingleDataTypeUnrecoverableError(const SyncError& error) = 0;
-
-  // This will create a SyncError object. This will also upload a breakpad call
-  // stack to crash server. A sync error usually means that sync has to be
-  // disabled either for that type or completely.
-  virtual SyncError CreateAndUploadError(
-      const tracked_objects::Location& location,
-      const std::string& message,
-      ModelType type) = 0;
-
- protected:
-  virtual ~DataTypeErrorHandler() {}
-};
-
-}  // namespace syncer
-
-#endif  // COMPONENTS_SYNC_CORE_DATA_TYPE_ERROR_HANDLER_H__