Use constructor args in favor of summary "encode" functions.

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

 // Copyright (c) 2015, 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 analyzer.src.summary.public_namespace_visitor;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/summary/format.dart';
 
 /**
  * Compute the public namespace portion of the summary for the given [unit],
  * which is presumed to be an unresolved AST.
  */
 UnlinkedPublicNamespaceBuilder computePublicNamespace(CompilationUnit unit) {
   _PublicNamespaceVisitor visitor = new _PublicNamespaceVisitor();
   unit.accept(visitor);
-  return encodeUnlinkedPublicNamespace(
+  return new UnlinkedPublicNamespaceBuilder(
       names: visitor.names, exports: visitor.exports, parts: visitor.parts);
 }
 
 class _CombinatorEncoder extends SimpleAstVisitor<UnlinkedCombinatorBuilder> {
   _CombinatorEncoder();
 
   List<String> encodeNames(NodeList<SimpleIdentifier> names) =>
       names.map((SimpleIdentifier id) => id.name).toList();
 
   @override
   UnlinkedCombinatorBuilder visitHideCombinator(HideCombinator node) {
-    return encodeUnlinkedCombinator(hides: encodeNames(node.hiddenNames));
+    return new UnlinkedCombinatorBuilder(hides: encodeNames(node.hiddenNames));
   }
 
   @override
   UnlinkedCombinatorBuilder visitShowCombinator(ShowCombinator node) {
-    return encodeUnlinkedCombinator(shows: encodeNames(node.shownNames));
+    return new UnlinkedCombinatorBuilder(shows: encodeNames(node.shownNames));
   }
 }
 
 class _PublicNamespaceVisitor extends RecursiveAstVisitor {
   final List<UnlinkedPublicNameBuilder> names = <UnlinkedPublicNameBuilder>[];
   final List<UnlinkedExportPublicBuilder> exports =
       <UnlinkedExportPublicBuilder>[];
   final List<String> parts = <String>[];
 
   _PublicNamespaceVisitor();
 
   void addNameIfPublic(
       String name, PrelinkedReferenceKind kind, int numTypeParameters) {
     if (isPublic(name)) {
-      names.add(encodeUnlinkedPublicName(
+      names.add(new UnlinkedPublicNameBuilder(
           name: name, kind: kind, numTypeParameters: numTypeParameters));
     }
   }
 
   bool isPublic(String name) => !name.startsWith('_');
 
   @override
   visitClassDeclaration(ClassDeclaration node) {
     addNameIfPublic(node.name.name, PrelinkedReferenceKind.classOrEnum,
         node.typeParameters?.typeParameters?.length ?? 0);
   }
 
   @override
   visitClassTypeAlias(ClassTypeAlias node) {
     addNameIfPublic(node.name.name, PrelinkedReferenceKind.classOrEnum,
         node.typeParameters?.typeParameters?.length ?? 0);
   }
 
   @override
   visitEnumDeclaration(EnumDeclaration node) {
     addNameIfPublic(node.name.name, PrelinkedReferenceKind.classOrEnum, 0);
   }
 
   @override
   visitExportDirective(ExportDirective node) {
-    exports.add(encodeUnlinkedExportPublic(
+    exports.add(new UnlinkedExportPublicBuilder(
         uri: node.uri.stringValue,
         combinators: node.combinators
             .map((Combinator c) => c.accept(new _CombinatorEncoder()))
             .toList()));
   }
 
   @override
   visitFunctionDeclaration(FunctionDeclaration node) {
     String name = node.name.name;
     if (node.isSetter) {
@@ skipping 21 matching lines @@
   @override
   visitVariableDeclaration(VariableDeclaration node) {
     String name = node.name.name;
     addNameIfPublic(name, PrelinkedReferenceKind.topLevelPropertyAccessor, 0);
     if (!node.isFinal && !node.isConst) {
       addNameIfPublic(
           '$name=', PrelinkedReferenceKind.topLevelPropertyAccessor, 0);
     }
   }
 }