Add support for redirectedConstructor to summaries.

pkg/analyzer/lib/src/summary/summarize_ast.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization.summarize_ast;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
@@ skipping 767 matching lines @@
     if (node.name != null) {
       b.name = node.name.name;
       b.nameOffset = node.name.offset;
     } else {
       b.nameOffset = node.returnType.offset;
     }
     b.parameters = node.parameters.parameters
         .map((FormalParameter p) => p.accept(this))
         .toList();
     b.kind = UnlinkedExecutableKind.constructor;
-    b.isFactory = node.factoryKeyword != null;
+    if (node.factoryKeyword != null) {
+      b.isFactory = true;
+      if (node.redirectedConstructor != null) {
+        b.isRedirectedConstructor = true;
+        b.redirectedConstructor = new _ConstExprSerializer(this, null)
+            .serializeConstructorName(node.redirectedConstructor.type,
+                node.redirectedConstructor.name);
+      }
+    } else {
+      for (ConstructorInitializer initializer in node.initializers) {
+        if (initializer is RedirectingConstructorInvocation) {
+          b.isRedirectedConstructor = true;
+          b.redirectedConstructorName = initializer.constructorName?.name;
+        }
+      }
+    }
     b.isConst = node.constKeyword != null;
     b.isExternal = node.externalKeyword != null;
     b.documentationComment = serializeDocumentation(node.documentationComment);
     b.annotations = serializeAnnotations(node.metadata);
     if (node.constKeyword != null) {
       Set<String> constructorParameterNames =
           node.parameters.parameters.map((p) => p.identifier.name).toSet();
       b.constantInitializers = node.initializers
           .map((ConstructorInitializer initializer) =>
               serializeConstructorInitializer(initializer, (Expression expr) {
@@ skipping 208 matching lines @@
 /**
  * A [_TypeParameterScope] is a [_Scope] which defines [_ScopedTypeParameter]s.
  */
 class _TypeParameterScope extends _Scope {
   /**
    * Get the number of [_ScopedTypeParameter]s defined in this
    * [_TypeParameterScope].
    */
   int get length => _definedNames.length;
 }