Move relational operators to the new interceptors.

sdk/lib/_internal/compiler/implementation/js/nodes.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;
 
 abstract class NodeVisitor<T> {
   T visitProgram(Program node);
 
   T visitBlock(Block node);
@@ skipping 847 matching lines @@
 
   int get precedenceLevel => PRIMARY;
 }
 
 Prefix typeOf(Expression argument) => new Prefix('typeof', argument);
 
 Binary equals(Expression left, Expression right) {
   return new Binary('==', left, right);
 }
 
+Binary strictEquals(Expression left, Expression right) {
+  return new Binary('===', left, right);
+}
+
 LiteralString string(String value) => new LiteralString('"$value"');
 
 If if_(Expression condition, Node then, [Node otherwise]) {
   return (otherwise == null)
       ? new If.noElse(condition, then)
       : new If(condition, then, otherwise);
 }
 
 Return return_([Expression value]) => new Return(value);
 
@@ skipping 16 matching lines @@
 Fun fun(List<String> parameterNames, Block body) {
   return new Fun(parameterNames.mappedBy((n) => new Parameter(n)).toList(),
                  body);
 }
 
 Assignment assign(Expression leftHandSide, Expression value) {
   return new Assignment(leftHandSide, value);
 }
 
 Expression undefined() => new Prefix('void', new LiteralNumber('0'));