In precompilation, finalize all classes eagerly. Use the stable class hierarchy for doing CHA based…

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index f7caee18d3618160072aaa28a06b2e501260afde..9c87d5f194806ad5b261e680697b08c96cc7bc1f 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -795,6 +795,7 @@ Isolate::Isolate(const Dart_IsolateFlags& api_flags)
       registered_service_extension_handlers_(GrowableObjectArray::null()),
       metrics_list_head_(NULL),
       compilation_allowed_(true),
+      all_classes_finalized_(false),
       next_(NULL),
       pause_loop_monitor_(NULL) {
   flags_.CopyFrom(api_flags);