Converted IDBVersionChangeEvent.dataLoss to an enumeration: IDBDataLossAmount

Source/modules/indexeddb/IDBVersionChangeEvent.h

Index: Source/modules/indexeddb/IDBVersionChangeEvent.h
diff --git a/Source/modules/indexeddb/IDBVersionChangeEvent.h b/Source/modules/indexeddb/IDBVersionChangeEvent.h
index cdf553627f0a74440b19db0522460146f4e81237..9d6f604d6012b5009e9ee764371286fa7dda4667 100644
--- a/Source/modules/indexeddb/IDBVersionChangeEvent.h
+++ b/Source/modules/indexeddb/IDBVersionChangeEvent.h
@@ -43,6 +43,7 @@ struct IDBVersionChangeEventInit : public EventInit {
 
     unsigned long long oldVersion;
     Nullable<unsigned long long> newVersion;
+    String dataLoss;
 };
 
 class IDBVersionChangeEvent FINAL : public Event {
@@ -77,7 +78,7 @@ private:
 
     unsigned long long m_oldVersion;
     Nullable<unsigned long long> m_newVersion;
-    bool m_dataLoss;
+    blink::WebIDBDataLoss m_dataLoss;
     String m_dataLossMessage;
 };