Improve the mirror support for deferred loading.

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
index efa29d847e2083d99088e0faad638ae62d965668..b3a5d697b76ddb73778ae76f3ac13961b12da9ce 100644
--- a/tests/lib/mirrors/deferred_mirrors_metadata_lib.dart
+++ b/tests/lib/mirrors/deferred_mirrors_metadata_lib.dart
@@ -1,16 +1,29 @@
 library lib;
 
 import "deferred_mirrors_metadata_test.dart";
-@MirrorsUsed(targets: const ["main", "main.A", "main.B", "main.C", "lib.D"])
+@MirrorsUsed(
+    targets: const ["main", "main.A", "main.B", "main.C", "main.D", "lib.E"])
 import "dart:mirrors";
 
-@C() class D {}
+class H {
+  const H();
+}
+
+class F {
+  @H() final int f;
+}
+
+@C() class E {
+  @D() var f;
+}
 
 String foo() {
-  String c = reflectClass(D).metadata[0].invoke(#toString, []).reflectee;
+  String c = reflectClass(E).metadata[0].invoke(#toString, []).reflectee;
+  String d = reflectClass(E).declarations[#f].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;
+  return a + b + c + d;
 }