Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/resolution/class_members.dart

 // Copyright (c) 2012, 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 resolution.compute_members;
 
 import '../elements/elements.dart'
     show Element,
          Name,
          PublicName,
@@ skipping 530 matching lines @@
                             MessageKind.INVALID_OVERRIDE_METHOD,
                             MessageKind.INVALID_OVERRIDDEN_METHOD);
             }
           }
         }
       }
     }
   }
 
   void reportErrorWithContext(Element errorneousElement,
-                         MessageKind errorMessage,
-                         Element contextElement,
-                         MessageKind contextMessage) {
+                              MessageKind errorMessage,
+                              Element contextElement,
+                              MessageKind contextMessage) {
     compiler.reportError(
         errorneousElement,
         errorMessage,
         {'memberName': contextElement.name,
          'className': contextElement.getEnclosingClass().name});
     compiler.reportInfo(contextElement, contextMessage);
   }
 
   static void computeClassMembers(Compiler compiler, BaseClassElementX cls) {
     if (cls.classMembers != null) return;
     MembersCreator creator = new MembersCreator(compiler, cls);
     creator.computeMembers();
     cls.classMembers = creator.classMembers;
     cls.interfaceMembers = creator.interfaceMembers;
   }
 }