dart2js: Change how super tear-offs are registered.

pkg/compiler/lib/src/js_backend/codegen/codegen.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library code_generator;
 
 import 'glue.dart';
 
 import '../../closure.dart' show
     ClosureClassElement;
@@ skipping 289 matching lines @@
   @override
   js.Expression visitInvokeStatic(tree_ir.InvokeStatic node) {
     FunctionElement target = node.target;
     List<js.Expression> arguments = visitExpressionList(node.arguments);
     return buildStaticInvoke(target, arguments,
           sourceInformation: node.sourceInformation);
   }
 
   @override
   js.Expression visitInvokeMethodDirectly(tree_ir.InvokeMethodDirectly node) {
+    if (node.isTearOff) {
+      // If this is a tear-off, register the fact that a tear-off closure
+      // will be created, and that this tear-off must bypass ordinary
+      // dispatch to ensure the super method is invoked.
+      registry.registerStaticUse(new StaticUse.staticInvoke(
+          glue.closureFromTearOff, new CallStructure.unnamed(
+            glue.closureFromTearOff.parameters.length)));
+      registry.registerStaticUse(new StaticUse.superTearOff(node.target));
+    }
     if (node.target is ConstructorBodyElement) {
       registry.registerStaticUse(
           new StaticUse.constructorBodyInvoke(
               node.target.declaration,
               new CallStructure.unnamed(node.arguments.length)));
       // A constructor body cannot be overriden or intercepted, so we can
       // use the short form for this invocation.
       return js.js('#.#(#)',
           [visitExpression(node.receiver),
            glue.instanceMethodName(node.target),
@@ skipping 760 matching lines @@
   void registerDefaultParameterValues(ExecutableElement element) {
     if (element is! FunctionElement) return;
     FunctionElement function = element;
     if (function.isStatic) return; // Defaults are inlined at call sites.
     function.functionSignature.forEachOptionalParameter((param) {
       ConstantValue constant = glue.getDefaultParameterValue(param);
       registry.registerCompileTimeConstant(constant);
     });
   }
 }