Register inlining as a StaticUse

pkg/compiler/lib/src/js_backend/enqueuer.dart

Index: pkg/compiler/lib/src/js_backend/enqueuer.dart
diff --git a/pkg/compiler/lib/src/js_backend/enqueuer.dart b/pkg/compiler/lib/src/js_backend/enqueuer.dart
index 45afb2f54a0f3bd8fc1e1a4e9b4cf794a7321599..5d7d7d9038fe468d06908c8b890d13992bb15ede 100644
--- a/pkg/compiler/lib/src/js_backend/enqueuer.dart
+++ b/pkg/compiler/lib/src/js_backend/enqueuer.dart
@@ -163,6 +163,10 @@ class CodegenEnqueuer extends EnqueuerImpl {
       case StaticUseKind.REDIRECTION:
         processTypeUse(new TypeUse.instantiation(staticUse.type));
         break;
+      case StaticUseKind.INLINING:
+        // TODO(johnniwinther): Should this be tracked with _MemberUsage ?
+        listener.registerUsedElement(staticUse.element);
+        break;
       default:
         break;
     }