Make deferred loading and meta-data play better.

tests/lib/mirrors/deferred_mirrors_metadata_lib.dart

Index: tests/lib/mirrors/deferred_mirrors_metadata_lib.dart
diff --git a/tests/lib/mirrors/deferred_mirrors_metadata_lib.dart b/tests/lib/mirrors/deferred_mirrors_metadata_lib.dart
new file mode 100644
index 0000000000000000000000000000000000000000..efa29d847e2083d99088e0faad638ae62d965668
--- /dev/null
+++ b/tests/lib/mirrors/deferred_mirrors_metadata_lib.dart
@@ -0,0 +1,16 @@
+library lib;
+
+import "deferred_mirrors_metadata_test.dart";
+@MirrorsUsed(targets: const ["main", "main.A", "main.B", "main.C", "lib.D"])
+import "dart:mirrors";
+
+@C() class D {}
+
+String foo() {
+  String c = reflectClass(D).metadata[0].invoke(#toString, []).reflectee;
+  InstanceMirror i = currentMirrorSystem().findLibrary(#main).metadata[0];
+  String a = i.invoke(#toString, []).reflectee;
+  String b = i.getField(#b).invoke(#toString, []).reflectee;
+  return a + b + c;
+}
+