Remove cancel and make crash exit with code 253.

sdk/lib/_internal/compiler/implementation/dart_backend/placeholder_collector.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 dart_backend;
 
 class LocalPlaceholder {
   final String identifier;
   final Set<Node> nodes;
   LocalPlaceholder(this.identifier) : nodes = new Set<Node>();
@@ skipping 349 matching lines @@
         .putIfAbsent(element, () => <ConstructorPlaceholder>[])
             .add(new ConstructorPlaceholder(node, type));
   }
   void makeRedirectingConstructorPlaceholder(Node node, Element element) {
     constructorPlaceholders
         .putIfAbsent(element, () => <ConstructorPlaceholder>[])
             .add(new ConstructorPlaceholder.redirectingCall(node));
   }
 
   void internalError(String reason, {Node node}) {
-    compiler.cancel(reason, node: node);
+    compiler.internalError(node, reason);
   }
 
   visit(Node node) => (node == null) ? null : node.accept(this);
 
   visitNode(Node node) { node.visitChildren(this); }  // We must go deeper.
 
   visitNewExpression(NewExpression node) {
     Send send = node.send;
     DartType type = treeElements.getType(node);
     assert(type != null);
@@ skipping 252 matching lines @@
 
   visitBlock(Block node) {
     for (Node statement in node.statements.nodes) {
       if (statement is VariableDefinitions) {
         makeVarDeclarationTypePlaceholder(statement);
       }
     }
     node.visitChildren(this);
   }
 }