Switch server tests to strong mode.

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.
 
 import 'dart:async';
 
 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';
@@ skipping 149 matching lines @@
       PerformanceLog log = new PerformanceLog(_logBuffer);
       AnalysisDriverScheduler scheduler = new AnalysisDriverScheduler(log);
       _driver = new AnalysisDriver(
           scheduler,
           log,
           provider,
           new MemoryByteStore(),
           _fileContentOverlay,
           null,
           sourceFactory,
-          new AnalysisOptionsImpl());
+          new AnalysisOptionsImpl()..strongMode = true);
       scheduler.start();
     } else {
       _context = AnalysisEngine.instance.createAnalysisContext();
       context.sourceFactory = sourceFactory;
     }
     AnalysisEngine.instance.logger = PrintLogger.instance;
   }
 
   void setupResourceProvider() {
     provider = new MemoryResourceProvider();
@@ skipping 35 matching lines @@
  * [engine.GeneralizingElementVisitor].
  */
 class _ElementVisitorFunctionWrapper extends GeneralizingElementVisitor {
   final _ElementVisitorFunction function;
   _ElementVisitorFunctionWrapper(this.function);
   visitElement(Element element) {
     function(element);
     super.visitElement(element);
   }
 }