Make Analysis Server tests use MockSdk again.

pkg/analysis_server/test/abstract_context.dart

 // Copyright (c) 2014, 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 testing.abstract_context;
 
 import 'dart:async';
 
+import 'mock_sdk.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
-import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
 import 'package:analyzer/src/dart/analysis/byte_store.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/file_state.dart';
-import 'package:analyzer/src/dart/sdk/sdk.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/engine.dart' as engine;
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 
 /**
  * Finds an [Element] with the given [name].
  */
 Element findChildElement(Element root, String name, [ElementKind kind]) {
   Element result = null;
   root.accept(new _ElementVisitorFunctionWrapper((Element element) {
     if (element.name != name) {
       return;
     }
     if (kind != null && element.kind != kind) {
       return;
     }
     result = element;
   }));
   return result;
 }
 
 /**
  * A function to be called for every [Element].
  */
 typedef void _ElementVisitorFunction(Element element);
 
 class AbstractContextTest {
-  static final DartSdk SDK = new FolderBasedDartSdk(
-      PhysicalResourceProvider.INSTANCE,
-      FolderBasedDartSdk.defaultSdkDirectory(PhysicalResourceProvider.INSTANCE))
-    ..useSummary = true;
+  static final DartSdk SDK = new MockSdk();
   static final UriResolver SDK_RESOLVER = new DartUriResolver(SDK);
 
   MemoryResourceProvider provider;
   Map<String, List<Folder>> packageMap;
   UriResolver resourceResolver;
 
   AnalysisContext _context;
 
   StringBuffer _logBuffer = new StringBuffer();
   FileContentOverlay _fileContentOverlay = new FileContentOverlay();
@@ skipping 141 matching lines @@
  * [engine.GeneralizingElementVisitor].
  */
 class _ElementVisitorFunctionWrapper extends GeneralizingElementVisitor {
   final _ElementVisitorFunction function;
   _ElementVisitorFunctionWrapper(this.function);
   visitElement(Element element) {
     function(element);
     super.visitElement(element);
   }
 }