Diagnose unresolved constructors in platform libraries.

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

Index: dart/sdk/lib/_internal/compiler/implementation/compiler.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
index 5ceb7d3dd76a41c0bb1773d96b0e785530406673..04421171a11e1c313ac04dc3c6210883bf3bd301 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/compiler.dart
@@ -968,13 +968,7 @@ abstract class Compiler implements DiagnosticListener {
     if (element.isClass()) {
       ClassElement cls = element;
       cls.ensureResolved(this);
-      cls.forEachLocalMember((e) {
-        if (e.isSynthesized) {
-          // TODO(ahe): Work-around for http://dartbug.com/11205.
-          if (e.getLibrary().isPlatformLibrary) return;
-        }
-        world.addToWorkList(e);
-      });
+      cls.forEachLocalMember(enqueuer.resolution.addToWorkList);
       world.registerInstantiatedClass(element, globalDependencies);
     } else {
       world.addToWorkList(element);