Fix the error message widget

lib/src/server/server.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.
 
 /// Development server that compiles Dart to JS on the fly.
 library dev_compiler.src.server;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
 import 'package:analyzer/file_system/file_system.dart' show ResourceUriResolver;
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/engine.dart'
     show AnalysisContext, ChangeSet;
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:logging/logging.dart' show Level, Logger, LogRecord;
 import 'package:path/path.dart' as path;
 import 'package:shelf/shelf.dart' as shelf;
 import 'package:shelf/shelf_io.dart' as shelf;
 import 'package:shelf_static/shelf_static.dart' as shelf_static;
 
 import '../codegen/code_generator.dart' show CodeGenerator;
 import '../codegen/html_codegen.dart' show generateEntryHtml;
 import '../codegen/js_codegen.dart';
 import '../analysis_context.dart';
-import '../compiler.dart' show AbstractCompiler;
+import '../compiler.dart' show AbstractCompiler, createErrorReporter;
 import '../info.dart'
     show AnalyzerMessage, CheckerResults, LibraryInfo, LibraryUnit;
 import '../options.dart';
 import '../report.dart';
 import '../utils.dart';
 
 import 'dependency_graph.dart';
 
 /// Encapsulates the logic when the compiler is run as a development server.
 class ServerCompiler extends AbstractCompiler {
@@ skipping 183 matching lines @@
 
     // TODO(sigmund): allow running without a dir, but keep output in memory?
     var outDir = options.codegenOptions.outputDir;
     if (outDir == null) {
       print('error: devc in server mode also requires specifying and '
           'output location for generated code.');
       exit(1);
     }
     var port = options.port;
     var host = options.host;
-    var compiler = new ServerCompiler(context, options);
+    var reporter = createErrorReporter(context, options);
+    var compiler = new ServerCompiler(context, options, reporter: reporter);
     return new DevServer._(compiler, outDir, host, port, entryPath);
   }
 
   DevServer._(ServerCompiler compiler, this.outDir, this.host, this.port,
       String entryPath)
       : this.compiler = compiler,
         // TODO(jmesserly): this logic is duplicated in a few places
         this._entryPath = compiler.options.sourceOptions.useImplicitHtml
             ? SourceResolverOptions.implicitHtmlFile
             : entryPath;
@@ skipping 58 matching lines @@
   Source resolveAbsolute(Uri uri, [Uri actualUri]) {
     var src = resolver.resolveAbsolute(uri, actualUri);
     return src.exists() ? src : null;
   }
 
   Uri restoreAbsolute(Source source) => resolver.restoreAbsolute(source);
 }
 
 final _log = new Logger('dev_compiler.src.server');
 final _earlyErrorResult = new CheckerResults(const [], true);