Revert "Migrate the IndexedDB backend from Blink to Chromium"

content/browser/indexed_db/indexed_db_database_callbacks_wrapper.cc

-// Copyright (c) 2013 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.
-
-#include "content/browser/indexed_db/indexed_db_database_callbacks_wrapper.h"
-
-namespace content {
-
-IndexedDBDatabaseCallbacksWrapper::IndexedDBDatabaseCallbacksWrapper(
-    WebKit::WebIDBDatabaseCallbacks* callbacks)
-    : callbacks_(callbacks) {}
-IndexedDBDatabaseCallbacksWrapper::~IndexedDBDatabaseCallbacksWrapper() {}
-
-void IndexedDBDatabaseCallbacksWrapper::OnForcedClose() {
-  if (!callbacks_)
-    return;
-  callbacks_->onForcedClose();
-  callbacks_.reset();
-}
-void IndexedDBDatabaseCallbacksWrapper::OnVersionChange(int64 old_version,
-                                                        int64 new_version) {
-  if (!callbacks_)
-    return;
-  callbacks_->onVersionChange(old_version, new_version);
-}
-
-void IndexedDBDatabaseCallbacksWrapper::OnAbort(
-    int64 transaction_id,
-    scoped_refptr<IndexedDBDatabaseError> error) {
-  if (!callbacks_)
-    return;
-  callbacks_->onAbort(
-      transaction_id,
-      WebKit::WebIDBDatabaseError(error->code(), error->message()));
-}
-void IndexedDBDatabaseCallbacksWrapper::OnComplete(int64 transaction_id) {
-  if (!callbacks_)
-    return;
-  callbacks_->onComplete(transaction_id);
-}
-
-}  // namespace content