dart2js: Run prepareNativeClasses in the program builder.

pkg/compiler/lib/src/js_emitter/program_builder.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.js_emitter.program_builder;
 
 import 'js_emitter.dart' show computeMixinClass;
 import 'model.dart';
 
 import '../common.dart';
@@ skipping 83 matching lines @@
       if (element.superclass != null) {
         c.setSuperclass(_classes[element.superclass]);
         assert(c.superclass != null);
       }
       if (c is MixinApplication) {
         c.setMixinClass(_classes[computeMixinClass(element)]);
         assert(c.mixinClass != null);
       }
     });
 
+    Map<Class, Map<String, js.Expression>> additionalProperties =
+        new Map<Class, Map<String, js.Expression>>();
+
+    List<Class> nativeNeededClasses =

[herhut, 2015/01/26 13:50:15]

This reads strange. Why not neededNativeClasses?

[floitsch, 2015/01/26 17:50:40]

Done.

+        _task.nativeEmitter.prepareNativeClasses(
+            nativeClasses,
+            additionalProperties);
+
     _markEagerClasses();
 
-    return new Program(outputs,
-                       nativeClasses,
-                       _task.outputContainsConstantList,
-                       _buildLoadMap());
+    return new Program(
+        outputs,
+        nativeNeededClasses,
+        additionalProperties,
+        _buildLoadMap(),
+        outputContainsNativeClasses: nativeNeededClasses.isNotEmpty,
+        outputContainsConstantList: _task.outputContainsConstantList);
   }
 
   void _markEagerClasses() {
     _markEagerInterceptorClasses();
   }
 
   /// Builds a map from loadId to outputs-to-load.
   Map<String, List<Fragment>> _buildLoadMap() {
     List<OutputUnit> convertHunks(List<OutputUnit> hunks) {
       return hunks.map((OutputUnit unit) => _outputs[unit])
@@ skipping 382 matching lines @@
       _registry.registerConstant(outputUnit, constantValue);
       assert(!_constants.containsKey(constantValue));
       String name = namer.constantName(constantValue);
       String constantObject = namer.globalObjectForConstant(constantValue);
       Holder holder = _registry.registerHolder(constantObject);
       Constant constant = new Constant(name, holder, constantValue);
       _constants[constantValue] = constant;
     }
   }
 }