Fire window.onerror for uncaught IndexedDB errors

LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html

Index: LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html
diff --git a/LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html b/LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html
index 3b436f5bf4a8d45080141dd5e2fdf6f9e3ac00ba..3b453a098698b617c2efc575b008c4398ea8c1ba 100644
--- a/LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html
+++ b/LayoutTests/storage/indexeddb/getdatabasenames-failed-open.html
@@ -12,7 +12,8 @@ function deleteDatabase(dbname)
         request.onsuccess = function() {
             resolve(request.result);
         };
-        request.onerror = function() {
+        request.onerror = function(e) {
+            e.preventDefault();
             reject(request.error);
         };
     });
@@ -25,7 +26,8 @@ function getDatabaseNames()
         request.onsuccess = function() {
             resolve(request.result);
         };
-        request.onerror = function() {
+        request.onerror = function(e) {
+            e.preventDefault();
             reject(request.error);
         };
     });
@@ -41,7 +43,8 @@ function openDatabaseAndAbortUpgrade(dbname)
         request.onsuccess = function() {
             reject(new Error('Open should not succeed'));
         };
-        request.onerror = function() {
+        request.onerror = function(e) {
+            e.preventDefault();
             resolve();
         };
     });