Add dart_invoke to tonic for calls into App code.

sky/engine/bindings/builtin_natives.cc

Index: sky/engine/bindings/builtin_natives.cc
diff --git a/sky/engine/bindings/builtin_natives.cc b/sky/engine/bindings/builtin_natives.cc
index afe3c3d37e2d58a7a78c0119faeee90377af294e..55584a3d0171a69da9eeecb9eed65ab9f432fc1e 100644
--- a/sky/engine/bindings/builtin_natives.cc
+++ b/sky/engine/bindings/builtin_natives.cc
@@ -19,6 +19,7 @@
 #include "sky/engine/tonic/dart_api_scope.h"
 #include "sky/engine/tonic/dart_builtin.h"
 #include "sky/engine/tonic/dart_error.h"
+#include "sky/engine/tonic/dart_invoke.h"
 #include "sky/engine/tonic/dart_isolate_scope.h"
 #include "sky/engine/tonic/dart_state.h"
 #include "sky/engine/tonic/dart_value.h"
@@ -154,7 +155,7 @@ static void ExecuteMicrotask(base::WeakPtr<DartState> dart_state,
     return;
   DartIsolateScope scope(dart_state->isolate());
   DartApiScope api_scope;
-  LogIfError(Dart_InvokeClosure(callback->dart_value(), 0, nullptr));
+  DartInvokeAppClosure(callback->dart_value(), 0, nullptr);
 }
 
 void ScheduleMicrotask(Dart_NativeArguments args) {