Do not compile a class when the class mirror tries to access the metadata.

tests/lib/mirrors/mirror_in_static_init_test.dart

Index: tests/lib/mirrors/mirror_in_static_init_test.dart
diff --git a/tests/lib/mirrors/mirror_in_static_init_test.dart b/tests/lib/mirrors/mirror_in_static_init_test.dart
index ae52922bb1e1f2d6969065e295c0c65bf0a5c0ae..471675e38ce8c543b0f7ed4ab0c093020f671171 100644
--- a/tests/lib/mirrors/mirror_in_static_init_test.dart
+++ b/tests/lib/mirrors/mirror_in_static_init_test.dart
@@ -19,7 +19,7 @@ abstract class C {
 
 final int staticField = () {
   var lib = currentMirrorSystem().findLibrary(#mirror_in_static_init_test);
-  var lst = new List.from(lib.declarations.values);
+  var lst = new List.from(lib.declarations[#C].declarations.values);
   return 42;
 }();