Add ParameterMirror.isInitializingFormal to dart:mirrors

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index 0c7b0bba81290769b4fa72c0bc7599125024a47b..5adf3b58a60f5829ee1f0dd2dcbe68068f792d6a 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -324,6 +324,7 @@ class _SyntheticSetterParameter implements ParameterMirror {
   Symbol get qualifiedName => _computeQualifiedName(owner, simpleName);
   TypeMirror get type => _target.type;
 
+  bool get isInitializingFormal => false;
   bool get isOptional => false;
   bool get isNamed => false;
   bool get isStatic => false;
@@ -1514,6 +1515,7 @@ class _LocalVariableMirror extends _LocalDeclarationMirror
 class _LocalParameterMirror extends _LocalVariableMirror
     implements ParameterMirror {
   final int _position;
+  final bool isInitializingFormal;
   final bool isOptional;
   final bool isNamed;
   final List _unmirroredMetadata;
@@ -1526,7 +1528,8 @@ class _LocalParameterMirror extends _LocalVariableMirror
                         this.isNamed,
                         bool isFinal,
                         this._defaultValueReflectee,
-                        this._unmirroredMetadata)
+                        this._unmirroredMetadata,
+                        this.isInitializingFormal)
       : super(reflectee,
               simpleName,
               owner,