- Fix for issue 25950 (add registration of a thread exit callback)

runtime/vm/timeline.cc

Index: runtime/vm/timeline.cc
diff --git a/runtime/vm/timeline.cc b/runtime/vm/timeline.cc
index 49cfc7d0c1028dcc2dd999f77379e1df1e8137d4..5f3d71956c3a7d561c95740b724dc0e2640794b2 100644
--- a/runtime/vm/timeline.cc
+++ b/runtime/vm/timeline.cc
@@ -993,9 +993,9 @@ void TimelineEventRecorder::WriteTo(const char* directory) {
   if (!FLAG_support_service) {
     return;
   }
-  Dart_FileOpenCallback file_open = Isolate::file_open_callback();
-  Dart_FileWriteCallback file_write = Isolate::file_write_callback();
-  Dart_FileCloseCallback file_close = Isolate::file_close_callback();
+  Dart_FileOpenCallback file_open = Dart::file_open_callback();
+  Dart_FileWriteCallback file_write = Dart::file_write_callback();
+  Dart_FileCloseCallback file_close = Dart::file_close_callback();
   if ((file_open == NULL) || (file_write == NULL) || (file_close == NULL)) {
     return;
   }