cps-ir: Support compilation of methods that use interceptor calling convention.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.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.
 
 library dart2js.ir_builder_task;
 
 import '../closure.dart' as closurelib;
 import '../closure.dart' hide ClosureScope;
 import '../constants/expressions.dart';
 import '../dart_types.dart';
@@ skipping 39 matching lines @@
 
   String get name => 'IR builder';
 
   bool hasIr(Element element) => nodes.containsKey(element.implementation);
 
   ir.RootNode getIr(ExecutableElement element) {
     return nodes[element.implementation];
   }
 
   ir.RootNode buildNode(AstElement element) {
+    return measure(() => _buildNode(element));
+  }
+
+  ir.RootNode _buildNode(AstElement element) {
     bailoutMessage = null;
     if (!canBuild(element)) {
       bailoutMessage = 'unsupported element ${element.name}:${element.kind}';
       return null;
     }
 
     TreeElements elementsMapping = element.resolvedAst.elements;
     element = element.implementation;
     return compiler.withCurrentElement(element, () {
       SourceInformationBuilder sourceInformationBuilder =
@@ skipping 2752 matching lines @@
     node.body = replacementFor(node.body);
   }
 }
 
 /// Visit a just-deleted subterm and unlink all [Reference]s in it.
 class RemovalVisitor extends ir.RecursiveVisitor {
   processReference(ir.Reference reference) {
     reference.unlink();
   }
 }