Add optional message to assert in Dart2js - continued

tests/compiler/dart2js/semantic_visitor_test_send_visitor.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.
 
 part of dart2js.semantics_visitor_test;
 
 class SemanticSendTestVisitor extends SemanticTestVisitor {
 
   SemanticSendTestVisitor(TreeElements elements) : super(elements);
 
   @override
   visitAs(
       Send node,
       Node expression,
       DartType type,
       arg) {
     visits.add(new Visit(VisitKind.VISIT_AS,
         expression: expression, type: type));
     apply(expression, arg);
   }
 
   @override
-  visitAssert(
-      Send node,
-      Node expression,
-      arg) {
-    visits.add(new Visit(VisitKind.VISIT_ASSERT, expression: expression));
-    super.visitAssert(node, expression, arg);
-  }
-
-  @override
-  errorInvalidAssert(
-      Send node,
-      NodeList arguments,
-      arg) {
-    visits.add(new Visit(VisitKind.ERROR_INVALID_ASSERT, arguments: arguments));
-    super.errorInvalidAssert(node, arguments, arg);
-  }
-
-  @override
   errorInvalidCompound(
       Send node,
       ErroneousElement error,
       AssignmentOperator operator,
       Node rhs,
       arg) {
     visits.add(new Visit(VisitKind.ERROR_INVALID_COMPOUND,
         error: error.messageKind, operator: operator, rhs: rhs));
     super.errorInvalidCompound(node, error, operator, rhs, arg);
   }
@@ skipping 3501 matching lines @@
       Element element,
       Node rhs,
       arg) {
     visits.add(new Visit(
         VisitKind.VISIT_UNRESOLVED_TOP_LEVEL_SETTER_SET_IF_NULL,
         getter: getter, rhs: rhs));
     super.visitUnresolvedTopLevelSetterSetIfNull(
         node, getter, element, rhs, arg);
   }
 }