Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/js_backend/backend.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.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
@@ skipping 1814 matching lines @@
       ClassElement cls = value.type.element;
       if (cls == noInlineClass) {
         hasNoInline = true;
         if (VERBOSE_OPTIMIZER_HINTS) {
           compiler.reportHere(element, "Cannot inline");
         }
         inlineCache.markAsNonInlinable(element);
       } else if (cls == noThrowsClass) {
         hasNoThrows = true;
         if (!Elements.isStaticOrTopLevelFunction(element)) {
-          compiler.internalErrorOnElement(
-              element,
+          compiler.internalError(element,
               "@NoThrows() is currently limited to top-level"
               " or static functions");
         }
         if (VERBOSE_OPTIMIZER_HINTS) {
           compiler.reportHere(element, "Cannot throw");
         }
         compiler.world.registerCannotThrow(element);
       } else if (cls == noSideEffectsClass) {
         hasNoSideEffects = true;
         if (VERBOSE_OPTIMIZER_HINTS) {
           compiler.reportHere(element, "Has no side effects");
         }
         compiler.world.registerSideEffectsFree(element);
       }
     }
     if (hasNoThrows && !hasNoInline) {
-      compiler.internalErrorOnElement(
-          element, "@NoThrows() should always be combined with @NoInline");
+      compiler.internalError(element,
+          "@NoThrows() should always be combined with @NoInline.");
     }
     if (hasNoSideEffects && !hasNoInline) {
-      compiler.internalErrorOnElement(
-          element, "@NoSideEffects() should always be combined with @NoInline");
+      compiler.internalError(element,
+          "@NoSideEffects() should always be combined with @NoInline.");
     }
   }
 
   CodeBuffer codeOf(Element element) {
     return generatedCode.containsKey(element)
         ? jsAst.prettyPrint(generatedCode[element], compiler)
         : null;
   }
 }
 
@@ skipping 48 matching lines @@
     copy(constant.values);
     copy(constant.protoValue);
     copy(constant);
   }
 
   void visitConstructed(ConstructedConstant constant) {
     copy(constant.fields);
     copy(constant);
   }
 }