FireFox compatibility fix for WorkerMessageEvent

lib/compiler/implementation/lib/native_helper.dart

Index: lib/compiler/implementation/lib/native_helper.dart
diff --git a/lib/compiler/implementation/lib/native_helper.dart b/lib/compiler/implementation/lib/native_helper.dart
index cdf0d3976eaf3c2469db852743840eb8d98d1bd1..b9adb168ca35434cc1c1fcd9f0476ac1a3e545fa 100644
--- a/lib/compiler/implementation/lib/native_helper.dart
+++ b/lib/compiler/implementation/lib/native_helper.dart
@@ -13,6 +13,7 @@ String typeNameInFirefox(obj) {
   if (name == 'Window') return 'DOMWindow';
   if (name == 'Document') return 'HTMLDocument';
   if (name == 'XMLDocument') return 'Document';
+  if (name == 'WorkerMessageEvent') return 'MessageEvent';
   return name;
 }
 
@@ -25,6 +26,9 @@ String typeNameInIE(obj) {
     if (JS('bool', '!!#.xmlVersion', obj)) return 'Document';
     return 'HTMLDocument';
   }
+  if (name == 'HTMLTableDataCellElement') return 'HTMLTableCellElement';
+  if (name == 'HTMLTableHeaderCellElement') return 'HTMLTableCellElement';
+  if (name == 'MSStyleCSSProperties') return 'CSSStyleDeclaration';
   return name;
 }