Upstream a couple of IndexedDB layout tests to WPT.

third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm

Index: third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm
diff --git a/third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm b/third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm
index 866a8b2ebffb19765304ef0164c70a9ea13949b3..36b997f2f639cd9c981964104868953455960098 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm
+++ b/third_party/WebKit/LayoutTests/external/wpt/IndexedDB/idbversionchangeevent.htm
@@ -51,10 +51,28 @@
         var deleterq = indexedDB.deleteDatabase('db');
 
         deleterq.onsuccess = t.step_func(function(e) {
+            assert_equals(e.result, undefined, "result (delete.success for nonexistent db)");
             assert_equals(e.oldVersion, 3, "old version (delete.success)");
             assert_equals(e.newVersion, null, "new version (delete.success)");
             assert_true(e instanceof IDBVersionChangeEvent, "delete.success instanceof IDBVersionChangeEvent");
 
+            setTimeout(deleteNonExistentDB, 10);
+        });
+
+        // Errors
+        deleterq.onerror = fail(t, "delete.error");
+        deleterq.onblocked = fail(t, "delete.blocked");
+    }
+
+    function deleteNonExistentDB (e) {
+        var deleterq = indexedDB.deleteDatabase('db-does-not-exist');
+
+        deleterq.onsuccess = t.step_func(function(e) {
+            assert_equals(e.result, undefined, "result (delete.success for nonexistent db)");
+            assert_equals(e.oldVersion, 0, "old version (delete.success for nonexistent db)");
+            assert_equals(e.newVersion, null, "new version (delete.success for nonexistent db)");
+            assert_true(e instanceof IDBVersionChangeEvent, "delete.success instanceof IDBVersionChangeEvent");
+
             setTimeout(function() { t.done(); }, 10);
         });