Introduce .isMalformed

pkg/compiler/lib/src/resolution/member_impl.dart

Index: pkg/compiler/lib/src/resolution/member_impl.dart
diff --git a/pkg/compiler/lib/src/resolution/member_impl.dart b/pkg/compiler/lib/src/resolution/member_impl.dart
index 072ddd1118ce14dfe77d0b2833335d7cd8b35993..9a2d7b067e3b99fb08a502269eaf843064c5458e 100644
--- a/pkg/compiler/lib/src/resolution/member_impl.dart
+++ b/pkg/compiler/lib/src/resolution/member_impl.dart
@@ -227,7 +227,7 @@ class SyntheticMember extends AbstractSyntheticMember {
 
   bool get isMethod => member.isMethod;
 
-  bool get isErroneous => false;
+  bool get isMalformed => false;
 
   String toString() => '${type.getStringAsDeclared('$name')} synthesized '
                        'from ${inheritedMembers}';
@@ -248,7 +248,7 @@ class ErroneousMember extends AbstractSyntheticMember {
 
   bool get isMethod => false;
 
-  bool get isErroneous => true;
+  bool get isMalformed => true;
 
   String toString() => "erroneous member '$name' synthesized "
                        "from ${inheritedMembers}";