dart2js: emit metadata in new emitter.

pkg/compiler/lib/src/js_emitter/new_emitter/model_emitter.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.
 
 library dart2js.new_js_emitter.model_emitter;
 
 import '../../dart2jslib.dart' show Compiler;
 import '../../js/js.dart' as js;
 import '../../js_backend/js_backend.dart' show
     JavaScriptBackend,
     Namer,
     ConstantEmitter;
 
 import 'package:_internal/compiler/js_lib/shared/embedded_names.dart' show
     DEFERRED_LIBRARY_URIS,
     DEFERRED_LIBRARY_HASHES,
     GET_TYPE_FROM_NAME,
     INITIALIZE_LOADED_HUNK,
     IS_HUNK_INITIALIZED,
     IS_HUNK_LOADED,
     MANGLED_GLOBAL_NAMES,
+    METADATA,
     TYPE_TO_INTERCEPTOR_MAP;
 
 import '../js_emitter.dart' show NativeGenerator;
 import '../model.dart';
 
 class ModelEmitter {
   final Compiler compiler;
   final Namer namer;
   final ConstantEmitter constantEmitter;
 
@@ skipping 132 matching lines @@
     if (program.typeToInterceptorMap != null) {
       globals.add(new js.Property(js.string(TYPE_TO_INTERCEPTOR_MAP),
                                   program.typeToInterceptorMap));
     }
 
     globals.add(new js.Property(js.string(MANGLED_GLOBAL_NAMES),
                                 js.js('Object.create(null)', [])));
 
     globals.add(emitGetTypeFromName());
 
+    globals.add(emitMetadata(program));
+
     js.ObjectInitializer globalsObject = new js.ObjectInitializer(globals);
 
     List<js.Statement> statements =
         [new js.ExpressionStatement(
             new js.VariableDeclarationList(
                 [new js.VariableInitialization(
                     new js.VariableDeclaration("init", allowRename: false),
                     globalsObject)]))];
     return new js.Block(statements);
   }
@@ skipping 49 matching lines @@
   }
 
   js.Property emitGetTypeFromName() {
     js.Expression function =
         js.js( """function(name) {
                     return holdersMap[name][name].ensureResolved();
                   }""");
     return new js.Property(js.string(GET_TYPE_FROM_NAME), function);
   }
 
+  js.Property emitMetadata(Program program) {
+    String metadataList = "[${program.metadata.join(",")}]";
+    js.Expression metadata =
+        js.js.uncachedExpressionTemplate(metadataList).instantiate([]);
+
+    return new js.Property(js.string(METADATA), metadata);
+  }
+
   js.Expression emitDeferredFragment(DeferredFragment fragment,
                                      List<Holder> holders) {
     // TODO(floitsch): initialize eager classes.
     // TODO(floitsch): the hash must depend on the output.
     int hash = this.hashCode;
     if (fragment.constants.isNotEmpty) {
       throw new UnimplementedError("constants in deferred units");
     }
     js.ArrayInitializer content =
         new js.ArrayInitializer(fragment.libraries.map(emitLibrary)
@@ skipping 338 matching lines @@
 
   var end = Date.now();
   print('Setup: ' + (end - start) + ' ms.');
 
   #main();  // Start main.
 
 }(Date.now(), #code)
 }""";
 
 }