Converted IDBVersionChangeEvent.dataLoss to an enumeration: IDBDataLossAmount

LayoutTests/storage/indexeddb/event-init-expected.txt

Index: LayoutTests/storage/indexeddb/event-init-expected.txt
diff --git a/LayoutTests/storage/indexeddb/event-init-expected.txt b/LayoutTests/storage/indexeddb/event-init-expected.txt
index 037d893131aa7aed2a80d58db5b13ff852c672dc..d5eda169936354f7a1c1a6adfb9587a0f1af168e 100644
--- a/LayoutTests/storage/indexeddb/event-init-expected.txt
+++ b/LayoutTests/storage/indexeddb/event-init-expected.txt
@@ -8,6 +8,7 @@ PASS event instanceof IDBVersionChangeEvent is true
 PASS event.type is "default"
 PASS event.oldVersion is 0
 PASS event.newVersion is null
+PASS event.dataLoss is "none"
 
 initEvent = {oldVersion: 123, newVersion: 456}
 event = new IDBVersionChangeEvent('foo', initEvent)
@@ -15,6 +16,15 @@ PASS event instanceof IDBVersionChangeEvent is true
 PASS event.type is "foo"
 PASS event.oldVersion is initEvent.oldVersion
 PASS event.newVersion is initEvent.newVersion
+PASS event.dataLoss is "none"
+
+initEvent = {oldVersion: 124, newVersion: 457, dataLoss: 'total'}
+event = new IDBVersionChangeEvent('foo2', initEvent)
+PASS event instanceof IDBVersionChangeEvent is true
+PASS event.type is "foo2"
+PASS event.oldVersion is initEvent.oldVersion
+PASS event.newVersion is initEvent.newVersion
+PASS event.dataLoss is initEvent.dataLoss
 
 initEvent = {oldVersion: 'legacy', newVersion: null}
 event = new IDBVersionChangeEvent('bar', initEvent)
@@ -22,6 +32,7 @@ PASS event instanceof IDBVersionChangeEvent is true
 PASS event.type is "bar"
 PASS event.oldVersion is 0
 PASS event.newVersion is null
+PASS event.dataLoss is "none"
 PASS successfullyParsed is true
 
 TEST COMPLETE