Add main() to analysis_abstract_test.dart to fix build.

pkg/analysis_server/test/analysis_abstract_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.domain.analysis.abstract;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/domain_analysis.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/resource.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
 
 import 'mocks.dart';
 
 
+main() {
+}
+
+
 /**
  * An abstract base for all 'analysis' domain tests.
  */
 class AbstractAnalysisTest {
   MockServerChannel serverChannel;
   MemoryResourceProvider resourceProvider;
   AnalysisServer server;
   AnalysisDomainHandler handler;
 
   Map<String, List<String>> analysisSubscriptions = {};
@@ skipping 241 matching lines @@
     int c = search.codeUnitAt(length);
     if (!(c >= 'a'.codeUnitAt(0) && c <= 'z'.codeUnitAt(0) ||
           c >= 'A'.codeUnitAt(0) && c <= 'Z'.codeUnitAt(0) ||
           c >= '0'.codeUnitAt(0) && c <= '9'.codeUnitAt(0))) {
       break;
     }
     length++;
   }
   return length;
 }