Enable messages in asserts by default

pkg/analyzer/test/generated/engine_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 analyzer.test.generated.engine_test;
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
@@ skipping 24 matching lines @@
 
 @reflectiveTest
 class AnalysisOptionsImplTest {
   test_resetToDefaults() {
     // Note that this only tests options visible from the interface.
     AnalysisOptionsImpl defaultOptions = new AnalysisOptionsImpl();
     AnalysisOptionsImpl modifiedOptions = new AnalysisOptionsImpl();
     modifiedOptions.dart2jsHint = true;
     modifiedOptions.disableCacheFlushing = true;
     modifiedOptions.enableAssertInitializer = true;
-    modifiedOptions.enableAssertMessage = true;
     modifiedOptions.enableLazyAssignmentOperators = true;
     modifiedOptions.enableStrictCallChecks = true;
     modifiedOptions.enableSuperMixins = true;
     modifiedOptions.enableTiming = true;
     modifiedOptions.enableUriInPartOf = true;
     modifiedOptions.errorProcessors = [null];
     modifiedOptions.excludePatterns = ['a'];
     modifiedOptions.finerGrainedInvalidation = true;
     modifiedOptions.generateImplicitErrors = false;
     modifiedOptions.generateSdkErrors = true;
     modifiedOptions.hint = false;
     modifiedOptions.incremental = true;
     modifiedOptions.incrementalApi = true;
     modifiedOptions.incrementalValidation = true;
     modifiedOptions.lint = true;
     modifiedOptions.lintRules = [null];
     modifiedOptions.patchPlatform = 3;
     modifiedOptions.preserveComments = false;
     modifiedOptions.strongMode = true;
     modifiedOptions.trackCacheDependencies = false;
 
     modifiedOptions.resetToDefaults();
 
     expect(modifiedOptions.dart2jsHint, defaultOptions.dart2jsHint);
     expect(modifiedOptions.disableCacheFlushing,
         defaultOptions.disableCacheFlushing);
     expect(modifiedOptions.enableAssertInitializer,
         defaultOptions.enableAssertInitializer);
-    expect(modifiedOptions.enableAssertMessage,
-        defaultOptions.enableAssertMessage);
     expect(modifiedOptions.enableLazyAssignmentOperators,
         defaultOptions.enableLazyAssignmentOperators);
     expect(modifiedOptions.enableStrictCallChecks,
         defaultOptions.enableStrictCallChecks);
     expect(modifiedOptions.enableSuperMixins, defaultOptions.enableSuperMixins);
     expect(modifiedOptions.enableTiming, defaultOptions.enableTiming);
     expect(modifiedOptions.enableUriInPartOf, defaultOptions.enableUriInPartOf);
     expect(modifiedOptions.errorProcessors, defaultOptions.errorProcessors);
     expect(modifiedOptions.excludePatterns, defaultOptions.excludePatterns);
     expect(modifiedOptions.finerGrainedInvalidation,
@@ skipping 690 matching lines @@
   @override
   void test_flushAstStructures(Source source) {
     fail("Unexpected invocation of test_flushAstStructures");
   }
 
   @override
   void visitContentCache(ContentCacheVisitor visitor) {
     fail("Unexpected invocation of visitContentCache");
   }
 }