Convert ContextBuilder to use FolderBasedSdk

pkg/analyzer/test/src/context/builder_test.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 analyzer.test.src.context.context_builder_test;
 
 import 'dart:io' as io;
 
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
@@ skipping 439 matching lines @@
   ContentCache contentCache;
 
   /**
    * The context builder to be used in the test.
    */
   ContextBuilder builder;
 
   @override
   void setUp() {
     resourceProvider = new MemoryResourceProvider();
-    sdkManager = new DartSdkManager('', false, (_) => new MockSdk());
+    new MockSdk(resourceProvider: resourceProvider);
+    sdkManager = new DartSdkManager('/', false, (_) {
+      fail('Should not be used to create an SDK');
+    });
     contentCache = new ContentCache();
     builder = new ContextBuilder(resourceProvider, sdkManager, contentCache);
   }
 
   void test_convertPackagesToMap_noPackages() {
     expect(builder.convertPackagesToMap(Packages.noPackages), isNull);
   }
 
   void test_convertPackagesToMap_null() {
     expect(builder.convertPackagesToMap(null), isNull);
@@ skipping 242 matching lines @@
     expect(locator.embedderYamls, hasLength(0));
   }
 
   void test_valid() {
     EmbedderYamlLocator locator = new EmbedderYamlLocator({
       'fox': [pathTranslator.getResource('/tmp')]
     });
     expect(locator.embedderYamls, hasLength(1));
   }
 }