Roll kernel to latest and add baseline test.

pkg/compiler/lib/src/elements/modelx.dart

Index: pkg/compiler/lib/src/elements/modelx.dart
diff --git a/pkg/compiler/lib/src/elements/modelx.dart b/pkg/compiler/lib/src/elements/modelx.dart
index 4eb76bb1ba583d0ec502f3e3f0149ce591437a5c..691e6d7149ba1535eff77457c9fcdb820dac2abc 100644
--- a/pkg/compiler/lib/src/elements/modelx.dart
+++ b/pkg/compiler/lib/src/elements/modelx.dart
@@ -224,6 +224,8 @@ class ErroneousElementX extends ElementX
 
   bool get isCyclicRedirection => false;
 
+  bool get isDefaultConstructor => false;
+
   bool get isMalformed => true;
 
   PrefixElement get redirectionDeferredPrefix => null;
@@ -2237,6 +2239,8 @@ abstract class ConstructorElementX extends FunctionElementX
   // generative constructors.
   bool get isCyclicRedirection => effectiveTarget.isRedirectingFactory;
 
+  bool get isDefaultConstructor => false;
+
   /// These fields are set by the post process queue when checking for cycles.
   ConstructorElement effectiveTargetInternal;
   DartType _effectiveTargetType;