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

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

Index: pkg/compiler/lib/src/js_backend/codegen/codegen.dart
diff --git a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
index 8f795fffddabc5fd61acdae48180a414daaaaeab..14471733eaaf67c9c9dcfc02a835cc1248f3b5dd 100644
--- a/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
+++ b/pkg/compiler/lib/src/js_backend/codegen/codegen.dart
@@ -205,7 +205,6 @@ class CodeGenerator extends tree_ir.StatementVisitor
     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);
@@ -326,6 +325,11 @@ class CodeGenerator extends tree_ir.StatementVisitor
         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)