Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/js_emitter/class_emitter.dart

 // Copyright (c) 2013, 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.js_emitter;
 
 class ClassEmitter extends CodeEmitterHelper {
   /**
    * Documentation wanted -- johnniwinther
    *
@@ skipping 185 matching lines @@
                 if (isIntercepted) {
                   task.interceptorEmitter.interceptorInvocationNames.add(
                       namer.setterName(field));
                 }
               } else {
                 setterCode = 1;
               }
             }
             int code = getterCode + (setterCode << 2);
             if (code == 0) {
-              compiler.reportInternalError(
-                  field, MessageKind.GENERIC,
-                  {'text': 'Field code is 0 ($element/$field)'});
+              compiler.internalError(field,
+                  'Field code is 0 ($element/$field).');
             } else {
               fieldCode = FIELD_CODE_CHARACTERS[code - FIRST_FIELD_CODE];
             }
           }
           if (backend.isAccessibleByReflection(field)) {
             reflectionMarker = '-';
             if (backend.isNeededForReflection(field)) {
               DartType type = field.computeType(compiler);
               reflectionMarker = '-${task.metadataEmitter.reifyType(type)}';
             }
@@ skipping 376 matching lines @@
       computeTypeVariable =
           js(r'this.$builtinTypeInfo && this.$builtinTypeInfo[#]', index);
     }
     jsAst.Expression convertRtiToRuntimeType =
         namer.elementAccess(compiler.findHelper('convertRtiToRuntimeType'));
     builder.addProperty(
         name, js.fun(
             [], [js.return_(convertRtiToRuntimeType(computeTypeVariable))]));
   }
 }