Remove copies of ExportNamespaceBuilder and PublicNamespaceBuilder.

pkg/analyzer/lib/src/context/context.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.context.context;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 707 matching lines @@
     }
 
     InterfaceType futureType = _classElement('Future', ['T']).type;
     InterfaceType streamType = _classElement('Stream', ['T']).type;
     CompilationUnitElementImpl asyncUnit =
         new CompilationUnitElementImpl("mock_async.dart");
     asyncUnit.types = <ClassElement>[futureType.element, streamType.element];
     LibraryElementImpl mockLib = new LibraryElementImpl.forNode(
         this, AstFactory.libraryIdentifier2(["dart.async"]));
     mockLib.definingCompilationUnit = asyncUnit;
-    mockLib.publicNamespace = new PublicNamespaceBuilder().build(mockLib);
+    mockLib.publicNamespace =
+        new NamespaceBuilder().createPublicNamespaceForLibrary(mockLib);
     return mockLib;
   }
 
   @override
   void dispose() {
     _disposed = true;
     for (List<PendingFuture> pendingFutures in _pendingFutureTargets.values) {
       for (PendingFuture pendingFuture in pendingFutures) {
         pendingFuture.forciblyComplete();
       }
@@ skipping 1388 matching lines @@
     }
     DartSdk sdk = factory.dartSdk;
     if (sdk == null) {
       throw new IllegalArgumentException(
           "The source factory for an SDK analysis context must have a DartUriResolver");
     }
     return new AnalysisCache(
         <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]);
   }
 }