Move relational operators to the new interceptors.

sdk/lib/_internal/compiler/implementation/js_backend/emitter.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;
 
 /**
  * A function element that represents a closure call. The signature is copied
  * from the given element.
  */
@@ skipping 747 matching lines @@
     if (identical(classElement, compiler.objectClass)
         && compiler.enabledNoSuchMethod) {
       // Emit the noSuchMethod handlers on the Object prototype now,
       // so that the code in the dynamicFunction helper can find
       // them. Note that this helper is invoked before analyzing the
       // full JS script.
       if (!nativeEmitter.handleNoSuchMethod) {
         emitNoSuchMethodHandlers(builder.addProperty);
       }
     }
+
+    if (backend.isInterceptorClass(classElement)) {
+      // The operator== method in [:Object:] does not take the same
+      // number of arguments as an intercepted method, therefore we
+      // explicitely add one to all interceptor classes. Note that we
+      // would not have do do that if all intercepted methods had
+      // a calling convention where the receiver is the first
+      // parameter.
+      String name = backend.namer.publicInstanceMethodNameByArity(
+          const SourceString('=='), 1);
+      Function kind = classElement == backend.jsNullClass

[kasperl, 2013/01/21 09:45:11]

Maybe add ( ) around the == expression.

[ngeoffray, 2013/01/21 10:41:44]

Done.

+          ? js.equals
+          : js.identity;
+      builder.addProperty(name, js.fun(['receiver', 'a'],
+          js.block1(js.return_(kind(js.use('receiver'), js.use('a'))))));
+    }
   }
 
   void emitRuntimeClassesAndTests(CodeBuffer buffer) {
     JavaScriptBackend backend = compiler.backend;
     RuntimeTypeInformation rti = backend.rti;
 
     TypeChecks typeChecks = rti.computeRequiredChecks();
 
     bool needsHolder(ClassElement cls) {
       return !neededClasses.contains(cls) || cls.isNative() ||
@@ skipping 1382 matching lines @@
 """;
 const String HOOKS_API_USAGE = """
 // The code supports the following hooks:
 // dartPrint(message)   - if this function is defined it is called
 //                        instead of the Dart [print] method.
 // dartMainRunner(main) - if this function is defined, the Dart [main]
 //                        method will not be invoked directly.
 //                        Instead, a closure that will invoke [main] is
 //                        passed to [dartMainRunner].
 """;