dart2js: Emit static const fields if accessible by reflections.

pkg/compiler/lib/src/js_emitter/program_builder/collector.dart

Index: pkg/compiler/lib/src/js_emitter/program_builder/collector.dart
diff --git a/pkg/compiler/lib/src/js_emitter/program_builder/collector.dart b/pkg/compiler/lib/src/js_emitter/program_builder/collector.dart
index eb8326de31aba227af0bf448c7ba72c31b05e72d..01299ab390a14eaab2eb475eadf2661f544f7813 100644
--- a/pkg/compiler/lib/src/js_emitter/program_builder/collector.dart
+++ b/pkg/compiler/lib/src/js_emitter/program_builder/collector.dart
@@ -274,15 +274,25 @@ class Collector {
 
   void computeNeededStaticNonFinalFields() {
     JavaScriptConstantCompiler handler = backend.constants;
-    Iterable<VariableElement> staticNonFinalFields = handler
-        .getStaticNonFinalFieldsForEmission()
-        .where(compiler.codegenWorld.allReferencedStaticFields.contains);
-    for (Element element in Elements.sortedByPosition(staticNonFinalFields)) {
+    addToOutputUnit(Element element) {
       List<VariableElement> list = outputStaticNonFinalFieldLists.putIfAbsent(
           compiler.deferredLoadTask.outputUnitForElement(element),
-          () => new List<VariableElement>());
+              () => new List<VariableElement>());
       list.add(element);
     }
+
+    Iterable<VariableElement> staticNonFinalFields = handler
+        .getStaticNonFinalFieldsForEmission()
+        .where(compiler.codegenWorld.allReferencedStaticFields.contains);
+
+    Elements.sortedByPosition(staticNonFinalFields).forEach(addToOutputUnit);
+
+    // We also need to emit static const fields if they are available for
+    // reflection.
+    compiler.codegenWorld.allReferencedStaticFields
+        .where((FieldElement field) => field.isConst)
+        .where(backend.isAccessibleByReflection)
+        .forEach(addToOutputUnit);
   }
 
   void computeNeededLibraries() {