dart2js: add compiler builtins to the core-runtime.

pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart

Index: pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart
diff --git a/pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart b/pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart
index 020b81bfad39727fdcdaaf139e4eeae99c5de96d..3341474cb6f9e363e9b7de428b7ec8e71887a056 100644
--- a/pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart
+++ b/pkg/compiler/lib/src/inferrer/simple_types_inferrer.dart
@@ -1088,10 +1088,16 @@ class SimpleTypeInferrerVisitor<T>
     Selector selector = elements.getSelector(node);
     String name = selector.name;
     handleStaticSend(node, selector, elements[node], arguments);
-    if (name == 'JS' || name == 'JS_EMBEDDED_GLOBAL') {
+    if (name == 'JS' || name == 'JS_EMBEDDED_GLOBAL' ||
+        name == 'JS_COMPILER_MACRO') {
       native.NativeBehavior nativeBehavior =
           compiler.enqueuer.resolution.nativeEnqueuer.getNativeBehaviorOf(node);
-      sideEffects.add(nativeBehavior.sideEffects);
+      if (name == 'JS_COMPILER_MACRO') {
+        // TODO(floitsch): this shouldn't be necessary.
+        sideEffects.setAllSideEffects();
+      } else {
+        sideEffects.add(nativeBehavior.sideEffects);
+      }
       return inferrer.typeOfNativeBehavior(nativeBehavior);
     } else if (name == 'JS_GET_NAME'
                || name == 'JS_NULL_CLASS_NAME'