Align IndexedDB metadata rollback on transaction abort to spec.

third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 746 matching lines @@
     if (!backendDB()) {
         exceptionState.throwDOMException(InvalidStateError, IDBDatabase::databaseClosedErrorMessage);
         return nullptr;
     }
 
     IDBRequest* request = IDBRequest::create(scriptState, IDBAny::create(this), m_transaction.get());
     backendDB()->count(m_transaction->id(), id(), IDBIndexMetadata::InvalidId, keyRange, WebIDBCallbacksImpl::create(request).release());
     return request;
 }
 
-void IDBObjectStore::abort()
+void IDBObjectStore::versionChangeTransactionAborted()
 {
     for (auto& index : m_createdIndexes)
         index->markDeleted();
 }
 
 void IDBObjectStore::transactionFinished()
 {
     ASSERT(m_transaction->isFinished());
 
     // Break reference cycles.
     // TODO(jsbell): This can be removed c/o Oilpan.
     m_indexMap.clear();
     m_createdIndexes.clear();
 }
 
+void IDBObjectStore::rollbackMetadata(const IDBObjectStoreMetadata& previousMetadata)
+{
+    DCHECK(m_metadata.id == previousMetadata.id);
+    m_metadata = previousMetadata;
+}
+
+
 int64_t IDBObjectStore::findIndexId(const String& name) const
 {
     for (const auto& it : m_metadata.indexes) {
         if (it.value.name == name) {
             ASSERT(it.key != IDBIndexMetadata::InvalidId);
             return it.key;
         }
     }
     return IDBIndexMetadata::InvalidId;
 }
 
 WebIDBDatabase* IDBObjectStore::backendDB() const
 {
     return m_transaction->backendDB();
 }
 
 } // namespace blink