Align IndexedDB metadata rollback on transaction abort to spec.

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

Index: third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
index 233de166d439ca55a86716d5adae8a0b1e49c79b..6cdc5729ddd796e4feebb1cdf4194765e5b9a23b 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -764,7 +764,7 @@ IDBRequest* IDBObjectStore::count(ScriptState* scriptState, const ScriptValue& r
     return request;
 }
 
-void IDBObjectStore::abort()
+void IDBObjectStore::versionChangeTransactionAborted()
 {
     for (auto& index : m_createdIndexes)
         index->markDeleted();
@@ -780,6 +780,13 @@ void IDBObjectStore::transactionFinished()
     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) {