Implement reflection on native classes.

dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
index 3a9154ac59c61f8276e432a2605ef036d861862c..310a717e5f3cd947851e423c08791110e8547df3 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
@@ -1833,16 +1833,25 @@ class CodeEmitterTask extends CompilerTask {
     emitSuper(superName, builder);
     emitRuntimeName(runtimeName, builder);
     emitClassFields(classElement, builder, superName);
-    var metadata = buildMetadataFunction(classElement);
-    if (metadata != null) {
-      builder.addProperty("@", metadata);
-    }
     emitClassGettersSetters(classElement, builder);
     if (!classElement.isMixinApplication) {
       emitInstanceMembers(classElement, builder);
     }
     emitIsTests(classElement, builder);
 
+    emitClassBuilderWithReflectionData(
+        className, classElement, builder, buffer);
+  }
+
+  void emitClassBuilderWithReflectionData(String className,
+                                          ClassElement classElement,
+                                          ClassBuilder builder,
+                                          CodeBuffer buffer) {
+    var metadata = buildMetadataFunction(classElement);
+    if (metadata != null) {
+      builder.addProperty("@", metadata);
+    }
+
     List<CodeBuffer> classBuffers = elementBuffers[classElement];
     if (classBuffers == null) {
       classBuffers = [];
@@ -1853,8 +1862,7 @@ class CodeEmitterTask extends CompilerTask {
     statics.write('{$n');
     bool hasStatics = false;
     ClassBuilder staticsBuilder = new ClassBuilder();
-    if (emitClassFields(
-            classElement, staticsBuilder, superName, emitStatics: true)) {
+    if (emitClassFields(classElement, staticsBuilder, '', emitStatics: true)) {

[ngeoffray, 2013/07/19 09:37:40]

I don't understand this change.

[ahe, 2013/07/19 10:00:00]

The superclass is irrelevant for the static field descriptor.  It was a
copy-and-paste mistake from when I added the 'static' property to class
descriptions.

I've updated the code to make it even clearer.

       hasStatics = true;
       statics.write('"":$_');
       statics.write(