More strong mode changes in analysis_server

pkg/analysis_server/test/protocol_server_test.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 test.computer.element;
 
 import 'dart:mirrors';
 
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol_server.dart';
@@ skipping 155 matching lines @@
       {Map<EngineEnum, ApiEnum> exceptions: const {}}) {
     ClassMirror engineClass = reflectClass(EngineEnum);
     engineClass.staticMembers.forEach((Symbol symbol, MethodMirror method) {
       if (symbol == #values) {
         return;
       }
       if (!method.isGetter) {
         return;
       }
       String enumName = MirrorSystem.getName(symbol);
-      EngineEnum engineValue = engineClass.getField(symbol).reflectee;
+      EngineEnum engineValue =
+          engineClass.getField(symbol).reflectee as EngineEnum;
       expect(engineValue, new isInstanceOf<EngineEnum>());
       if (exceptions.containsKey(engineValue)) {
         ApiEnum expectedResult = exceptions[engineValue];
         if (expectedResult == null) {
           expect(() {
             convert(engineValue);
           }, throws);
         } else {
           ApiEnum apiValue = convert(engineValue);
           expect(apiValue, equals(expectedResult));
         }
       } else {
         ApiEnum apiValue = convert(engineValue);
         expect(apiValue.name, equals(enumName));
       }
     });
   }
 }