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runtime/bin/dartutils.cc

Index: runtime/bin/dartutils.cc
diff --git a/runtime/bin/dartutils.cc b/runtime/bin/dartutils.cc
index c443fc91f6ed86d008b3a41397230ab16a79b657..ab4d6be095923a49646d05fe2374a5316f01ca2a 100644
--- a/runtime/bin/dartutils.cc
+++ b/runtime/bin/dartutils.cc
@@ -15,6 +15,7 @@
 #include "bin/extensions.h"
 #include "bin/file.h"
 #include "bin/io_buffer.h"
+#include "bin/isolate_data.h"
 #include "bin/platform.h"
 #include "bin/socket.h"
 #include "bin/utils.h"
@@ -486,7 +487,9 @@ Dart_Handle DartUtils::LoadScript(const char* script_uri,
     return NewDartUnsupportedError("Service did not return load port.");
   }
   Builtin::SetLoadPort(load_port);
-
+  IsolateData* isolate_data =
+      reinterpret_cast<IsolateData*>(Dart_CurrentIsolateData());
+  Dart_TimelineAsyncBegin("LoadScript", &(isolate_data->load_async_id));
   return LoadDataAsync_Invoke(Dart_Null(), uri, Dart_Null(), builtin_lib);
 }
 
@@ -591,6 +594,11 @@ void FUNCTION_NAME(Builtin_LoadSource)(Dart_NativeArguments args) {
 // no more outstanding load requests.
 void FUNCTION_NAME(Builtin_DoneLoading)(Dart_NativeArguments args) {
   Dart_Handle res = Dart_FinalizeLoading(true);
+  IsolateData* isolate_data =
+      reinterpret_cast<IsolateData*>(Dart_CurrentIsolateData());
+  if (isolate_data->load_async_id >= 0) {
+    Dart_TimelineAsyncEnd("LoadScript", isolate_data->load_async_id);
+  }
   if (Dart_IsError(res)) {
     // TODO(hausner): If compilation/loading errors are supposed to
     // be observable by the program, we need to mark the bad library