dart2js cps: Ensure JSArray is emitted when we see a type cast.

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 '../../tree_ir/tree_ir_nodes.dart' as tree_ir;
 import '../../tree_ir/tree_ir_nodes.dart' show BuiltinOperator;
@@ skipping 187 matching lines @@
     js.Expression elementAccess = glue.staticFunctionAccess(target);
     return new js.Call(elementAccess, arguments,
         sourceInformation: sourceInformation);
   }
 
   @override
   js.Expression visitInvokeConstructor(tree_ir.InvokeConstructor node) {
     if (node.constant != null) return giveup(node);
 
     registry.registerInstantiatedType(node.type);
-    Selector selector = node.selector;
     FunctionElement target = node.target;
     List<js.Expression> arguments = visitExpressionList(node.arguments);
     return buildStaticInvoke(target, arguments);
   }
 
   void registerMethodInvoke(tree_ir.InvokeMethod node) {
     Selector selector = node.selector;
     TypeMask mask = node.mask;
     if (selector.isGetter) {
       registry.registerDynamicGetter(new UniverseSelector(selector, mask));
@@ skipping 100 matching lines @@
       ClassElement clazz = type.element;
 
       // Handle some special checks against classes that exist only in
       // the compile-time class hierarchy, not at runtime.
       if (clazz == glue.jsExtendableArrayClass) {
         return js.js(r'!#.fixed$length', <js.Expression>[value]);
       } else if (clazz == glue.jsMutableArrayClass) {
         return js.js(r'!#.immutable$list', <js.Expression>[value]);
       }
 
+      // The helper we use needs the JSArray class to exist, but for some
+      // reason the helper does not cause this dependency to be registered.
+      // TODO(asgerf): Most programs need List anyway, but we should fix this.
+      registry.registerInstantiatedClass(glue.listClass);
+
       // We use one of the two helpers:
       //
       //     checkSubtype(value, $isT, typeArgs, $asT)
       //     subtypeCast(value, $isT, typeArgs, $asT)
       //
       // Any of the last two arguments may be null if there are no type
       // arguments, and/or if no substitution is required.
       Element function = node.isTypeTest
           ? glue.getCheckSubtype()
           : glue.getSubtypeCast();
@@ skipping 423 matching lines @@
         return js.js("typeof # === 'number' && Math.floor(#) === #", args);
     }
   }
 
   visitFunctionExpression(tree_ir.FunctionExpression node) {
     // FunctionExpressions are currently unused.
     // We might need them if we want to emit raw JS nested functions.
     throw 'FunctionExpressions should not be used';
   }
 }