Issue 23444. Use ConstructorMember(s) for super constructor fixes.

pkg/analyzer/lib/src/generated/element.dart

Index: pkg/analyzer/lib/src/generated/element.dart
diff --git a/pkg/analyzer/lib/src/generated/element.dart b/pkg/analyzer/lib/src/generated/element.dart
index f7278d4845101cee952b959b436f6243275138eb..5ad1e919db13b96228cc77a59b5303e4d10111fb 100644
--- a/pkg/analyzer/lib/src/generated/element.dart
+++ b/pkg/analyzer/lib/src/generated/element.dart
@@ -5769,6 +5769,11 @@ abstract class InterfaceType implements ParameterizedType {
    */
   List<PropertyAccessorElement> get accessors;
 
+  /**
+   * Return a list containing all of the constructors declared in this type.
+   */
+  List<ConstructorElement> get constructors;
+
   @override
   ClassElement get element;
 
@@ -6127,6 +6132,17 @@ class InterfaceTypeImpl extends TypeImpl implements InterfaceType {
   }
 
   @override
+  List<ConstructorElement> get constructors {
+    List<ConstructorElement> constructors = element.constructors;
+    List<ConstructorElement> members =
+        new List<ConstructorElement>(constructors.length);
+    for (int i = 0; i < constructors.length; i++) {
+      members[i] = ConstructorMember.from(constructors[i], this);
+    }
+    return members;
+  }
+
+  @override
   String get displayName {
     String name = this.name;
     List<DartType> typeArguments = this.typeArguments;