lib/html/dart2js/html_dart2js.dart

Index: lib/html/dart2js/html_dart2js.dart
diff --git a/lib/html/dart2js/html_dart2js.dart b/lib/html/dart2js/html_dart2js.dart
index 2cb76c5bb8b4b26e6044cefd09ceba48dc204025..4bd1d4024b49d1ac71cc9de13ded44a991684865 100644
--- a/lib/html/dart2js/html_dart2js.dart
+++ b/lib/html/dart2js/html_dart2js.dart
@@ -16381,20 +16381,20 @@ abstract class IDBKeyRange {
   /**
    * @domName IDBKeyRange.lowerBound
    */
-  factory IDBKeyRange.lowerBound(/*IDBKey*/ bound, [bool open]) =>
+  factory IDBKeyRange.lowerBound(/*IDBKey*/ bound, [bool open = false]) =>
       _IDBKeyRangeFactoryProvider.createIDBKeyRange_lowerBound(bound, open);
 
   /**
    * @domName IDBKeyRange.upperBound
    */
-  factory IDBKeyRange.upperBound(/*IDBKey*/ bound, [bool open]) =>
+  factory IDBKeyRange.upperBound(/*IDBKey*/ bound, [bool open = false]) =>
       _IDBKeyRangeFactoryProvider.createIDBKeyRange_upperBound(bound, open);
 
   /**
    * @domName IDBKeyRange.bound
    */
   factory IDBKeyRange.bound(/*IDBKey*/ lower, /*IDBKey*/ upper,
-                            [bool lowerOpen, bool upperOpen]) =>
+                            [bool lowerOpen = false, bool upperOpen = false]) =>
       _IDBKeyRangeFactoryProvider.createIDBKeyRange_bound(
           lower, upper, lowerOpen, upperOpen);
 
@@ -20035,9 +20035,10 @@ class _ModElementImpl extends _ElementImpl implements ModElement native "*HTMLMo
 abstract class MouseEvent implements UIEvent {
 
   factory MouseEvent(String type, Window view, int detail, int screenX, int screenY,
-      int clientX, int clientY, int button, [bool canBubble, bool cancelable,
-      bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
-      EventTarget relatedTarget]) =>
+      int clientX, int clientY, int button, [bool canBubble = true,
+      bool cancelable = true, bool ctrlKey = false, bool altKey = false,
+      bool shiftKey = false, bool metaKey = false,
+      EventTarget relatedTarget = null]) =>
       _MouseEventFactoryProvider.createMouseEvent(
           type, view, detail, screenX, screenY,
           clientX, clientY, button, canBubble, cancelable,