Add a new magic element type for annotating types that have Javascript array behavior.

lib/compiler/implementation/native_handler.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.
 
 #library('native');
 #import('dart:uri');
 #import('leg.dart');
 #import('elements/elements.dart');
 #import('scanner/scannerlib.dart');
 #import('ssa/ssa.dart');
@@ skipping 65 matching lines @@
                        LibraryElement library,
                        Uri uri) {
   String libraryName = uri.toString();
   if (library.script.name.contains('dart/frog/tests/frog_native')
       || libraryName == 'dart:dom_deprecated'
       || libraryName == 'dart:isolate'
       || libraryName == 'dart:html') {
     library.define(new ForeignElement(
         const SourceString('native'), library), compiler);
     library.canUseNative = true;
+    library.define(compiler.javaScriptIndexingBehaviorInterface, compiler);

[ahe, 2012/06/12 18:30:04]

For the unit tests, it may make sense to test for null here.

[ngeoffray, 2012/06/13 13:02:42]

Done.

   }
 
   // Additionaly, if this is a test, we allow access to foreign functions.
   if (library.script.name.contains('dart/frog/tests/frog_native')) {
     library.define(compiler.findHelper(const SourceString('JS')), compiler);
   }
 }
 
 void checkAllowedLibrary(ElementListener listener, Token token) {
   LibraryElement currentLibrary = listener.compilationUnitElement.getLibrary();
@@ skipping 254 matching lines @@
                                       String parameters) {
   buffer.add("  if (Object.getPrototypeOf(this).hasOwnProperty");
   buffer.add("('$methodName')) {\n");
   buffer.add("  $code");
   buffer.add("  } else {\n");
   buffer.add("    return Object.prototype.$methodName.call(this");
   buffer.add(parameters == '' ? '' : ', $parameters');
   buffer.add(");\n");
   buffer.add("  }\n");
 }