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tools/dom/src/dart2js_DOMImplementation.dart

Index: tools/dom/src/dart2js_DOMImplementation.dart
diff --git a/tools/dom/src/dart2js_DOMImplementation.dart b/tools/dom/src/dart2js_DOMImplementation.dart
index 24e6a6cd569e3ca79411e4b7bbcb870be887e2c3..81e9d6d3a3f7a0d96c96ba8caa3b586138d3ca7f 100644
--- a/tools/dom/src/dart2js_DOMImplementation.dart
+++ b/tools/dom/src/dart2js_DOMImplementation.dart
@@ -57,7 +57,7 @@ class _DOMWindowCrossFrame implements WindowBase {
   Events get on => throw new UnsupportedError(
     'You can only attach EventListeners to your own window.');
   // TODO(efortuna): Remove this method. dartbug.com/16814
-  void _addEventListener([String type, EventListener listener, bool useCapture])
+  void _addEventListener(String type, EventListener listener, [bool useCapture])
       => throw new UnsupportedError(
     'You can only attach EventListeners to your own window.');
   // TODO(efortuna): Remove this method. dartbug.com/16814
@@ -68,8 +68,8 @@ class _DOMWindowCrossFrame implements WindowBase {
   bool dispatchEvent(Event event) => throw new UnsupportedError(
     'You can only attach EventListeners to your own window.');
   // TODO(efortuna): Remove this method. dartbug.com/16814
-  void _removeEventListener([String type, EventListener listener,
-      bool useCapture]) => throw new UnsupportedError(
+  void _removeEventListener(String type, EventListener listener,
+      [bool useCapture]) => throw new UnsupportedError(
     'You can only attach EventListeners to your own window.');
   // TODO(efortuna): Remove this method. dartbug.com/16814
   void removeEventListener(String type, EventListener listener,