Initial isolate reload support

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
diff --git a/runtime/vm/dart_api_impl.cc b/runtime/vm/dart_api_impl.cc
index 5633c72e9756a485809133a2bb9a3ee642caf89e..45681a0e9fe9dea8a8d309fd8f9677bee69c319b 100644
--- a/runtime/vm/dart_api_impl.cc
+++ b/runtime/vm/dart_api_impl.cc
@@ -5641,6 +5641,8 @@ DART_EXPORT Dart_Handle Dart_FinalizeLoading(bool complete_futures) {
     return state;
   }
 
+  I->DoneFinalizing();
+
   // Now that the newly loaded classes are finalized, notify the debugger
   // that new code has been loaded. If there are latent breakpoints in
   // the new code, the debugger convert them to unresolved source breakpoints.