dart2js: add compiler builtins to the core-runtime.

pkg/compiler/lib/src/native/enqueue.dart

 // Copyright (c) 2014, 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 native;
 
 /**
  * This could be an abstract class but we use it as a stub for the dart_backend.
  */
 class NativeEnqueuer {
@@ skipping 36 matching lines @@
    * types.
    *
    * For example, the following code instantiates and returns a String class
    *
    *     JS_EMBEDDED_GLOBAL('String', 'foo')
    *
    */
   // TODO(sra): The entry from codegen will not have a resolver.
   void registerJsEmbeddedGlobalCall(Send node, ResolverVisitor resolver) {}
 
+  /**
+   * Handles JS-compiler builtin calls, which can be an instantiation point for
+   * types.
+   *
+   * For example, the following code instantiates and returns a String class
+   *
+   *     JS_BUILTIN('String', 'int2string', 0)
+   *
+   */
+  // TODO(sra): The entry from codegen will not have a resolver.
+  void registerJsBuiltinCall(Send node, ResolverVisitor resolver) {}
+
   /// Emits a summary information using the [log] function.
   void logSummary(log(message)) {}
 
   // Do not use annotations in dart2dart.
   ClassElement get annotationCreatesClass => null;
   ClassElement get annotationReturnsClass => null;
   ClassElement get annotationJsNameClass => null;
 }
 
 
@@ skipping 418 matching lines @@
   }
 
   void registerJsEmbeddedGlobalCall(Send node, ResolverVisitor resolver) {
     NativeBehavior behavior =
         NativeBehavior.ofJsEmbeddedGlobalCall(node, compiler, resolver);
     processNativeBehavior(behavior, node);
     nativeBehaviors[node] = behavior;
     flushQueue();
   }
 
+  void registerJsBuiltinCall(Send node, ResolverVisitor resolver) {
+    NativeBehavior behavior =
+        NativeBehavior.ofJsBuiltinCall(node, compiler, resolver);
+    processNativeBehavior(behavior, node);
+    nativeBehaviors[node] = behavior;
+    flushQueue();
+  }
+
   NativeBehavior getNativeBehaviorOf(Send node) => nativeBehaviors[node];
 
   processNativeBehavior(NativeBehavior behavior, cause) {
     // TODO(ahe): Is this really a global dependency?
     Registry registry = compiler.globalDependencies;
     bool allUsedBefore = unusedClasses.isEmpty;
     for (var type in behavior.typesInstantiated) {
       if (matchedTypeConstraints.contains(type)) continue;
       matchedTypeConstraints.add(type);
       if (type is SpecialType) {
@@ skipping 158 matching lines @@
         superclass,
         () => <ClassElement>[]);
     directSubtypes.add(cls);
   }
 
   void logSummary(log(message)) {
     log('Compiled ${registeredClasses.length} native classes, '
         '${unusedClasses.length} native classes omitted.');
   }
 }