Minor IndexedDB refactorings.

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

Index: third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.cpp
index 9be4f6b841f3de036df3f91fb97889ee27c4c58d..aa9f4c087d414cfd935f05806e6fa6170842074f 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBOpenDBRequest.cpp
@@ -91,7 +91,7 @@ void IDBOpenDBRequest::onUpgradeNeeded(int64_t oldVersion, std::unique_ptr<WebID
     if (!shouldEnqueueEvent())
         return;
 
-    ASSERT(m_databaseCallbacks);
+    DCHECK(m_databaseCallbacks);
 
     IDBDatabase* idbDatabase = IDBDatabase::create(getExecutionContext(), std::move(backend), m_databaseCallbacks.release());
     idbDatabase->setMetadata(metadata);
@@ -103,7 +103,7 @@ void IDBOpenDBRequest::onUpgradeNeeded(int64_t oldVersion, std::unique_ptr<WebID
     IDBDatabaseMetadata oldMetadata(metadata);
     oldMetadata.version = oldVersion;
 
-    m_transaction = IDBTransaction::create(getScriptState(), m_transactionId, idbDatabase, this, oldMetadata);
+    m_transaction = IDBTransaction::createVersionChange(getScriptState(), m_transactionId, idbDatabase, this, oldMetadata);
     setResult(IDBAny::create(idbDatabase));
 
     if (m_version == IDBDatabaseMetadata::NoVersion)