dart2js: rename Elements.isErroneousElement to Elements.isErroneous.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart
index 25a9ff94b32c226077b7e6bb384ae5aab19219e6..b292b4e5a40a78195b4123c7a8cf337637b7011d 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_visitor.dart
@@ -944,7 +944,7 @@ class IrBuilderVisitor extends ResolvedVisitor<ir.Primitive>
 
     if (Elements.isLocal(element)) {
       irBuilder.buildLocalSet(element, valueToStore);
-    } else if ((!node.isSuperCall && Elements.isErroneousElement(element)) ||
+    } else if ((!node.isSuperCall && Elements.isErroneous(element)) ||
                 Elements.isStaticOrTopLevel(element)) {
       irBuilder.buildStaticSet(
           element, elements.getSelector(node), valueToStore);