More strong mode changes in analysis_server

pkg/analysis_server/test/analysis/update_content_test.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 test.analysis.updateContent;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/services/index/index.dart';
@@ skipping 12 matching lines @@
   initializeTestEnvironment();
   defineReflectiveTests(UpdateContentTest);
 }
 
 compilationUnitMatcher(String file) {
   return new _ArgumentMatcher_CompilationUnit(file);
 }
 
 @reflectiveTest
 class UpdateContentTest extends AbstractAnalysisTest {
-  Map<String, List<AnalysisError>> filesErrors = {};
+  Map<String, List<String>> filesErrors = {};
   int serverErrorCount = 0;
   int navigationCount = 0;
 
   Index createIndex() {
     return new _MockIndex();
   }
 
   @override
   void processNotification(Notification notification) {
     if (notification.event == ANALYSIS_ERRORS) {
       var decoded = new AnalysisErrorsParams.fromNotification(notification);
-      _format(AnalysisError e) => "${e.location.startLine}: ${e.message}";
+      String _format(AnalysisError e) =>
+          "${e.location.startLine}: ${e.message}";
       filesErrors[decoded.file] = decoded.errors.map(_format).toList();
     }
     if (notification.event == ANALYSIS_NAVIGATION) {
       navigationCount++;
     }
     if (notification.event == SERVER_ERROR) {
       serverErrorCount++;
     }
   }
 
@@ skipping 234 matching lines @@
 
   _ArgumentMatcher_CompilationUnit(this.file);
 
   @override
   bool matches(arg) {
     return arg is CompilationUnit && arg.element.source.fullName == file;
   }
 }
 
 class _MockIndex extends TypedMock implements Index {}