Add optional and named parameters to FunctionType.

sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart

Index: sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart b/sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart
index 9c4077ddcd1f4eb3d0b8e06519887c0fd8350a85..f42259b77a13c0669f7a8b5a1f40289f3887655e 100644
--- a/sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart_backend/backend.dart
@@ -387,8 +387,13 @@ class DartBackend extends Backend {
       SynthesizedConstructorElementX constructor =
           new SynthesizedConstructorElementX(classElement);
       constructor.type = new FunctionType(
-          compiler.types.voidType, const Link<DartType>(),
-          constructor);
+          constructor,
+          compiler.types.voidType,
+          const Link<DartType>(),
+          const Link<DartType>(),
+          const Link<SourceString>(),
+          const Link<DartType>()
+          );
       constructor.cachedNode = new FunctionExpression(
           new Send(classNode.name, synthesizedIdentifier),
           new NodeList(new StringToken(OPEN_PAREN_INFO, '(', -1),