Timeline: If the embedder stream is enabled at startup, invoke the embedder's callback to let it kn…

runtime/vm/timeline.cc

Index: runtime/vm/timeline.cc
diff --git a/runtime/vm/timeline.cc b/runtime/vm/timeline.cc
index 5f3d71956c3a7d561c95740b724dc0e2640794b2..ecfe3f43bb7f71603d8d22eb1cbb59a046c562e3 100644
--- a/runtime/vm/timeline.cc
+++ b/runtime/vm/timeline.cc
@@ -146,6 +146,11 @@ void Timeline::InitOnce() {
                         &stream_##name##_enabled_);
   TIMELINE_STREAM_LIST(TIMELINE_STREAM_FLAG_DEFAULT)
 #undef TIMELINE_STREAM_FLAG_DEFAULT
+
+  if (stream_Embedder_enabled_ &&
+      (Timeline::get_start_recording_cb() != NULL)) {
+    Timeline::get_start_recording_cb()();
+  }
 }
 
 
@@ -167,9 +172,16 @@ void Timeline::StreamStateChange(const char* stream_name,
 
 void Timeline::Shutdown() {
   ASSERT(recorder_ != NULL);
+
+  if (stream_Embedder_enabled_ &&
+      (Timeline::get_stop_recording_cb() != NULL)) {
+    Timeline::get_stop_recording_cb()();
+  }
+
   if (FLAG_timeline_dir != NULL) {
     recorder_->WriteTo(FLAG_timeline_dir);
   }
+
   // Disable global streams.
 #define TIMELINE_STREAM_DISABLE(name, not_used)                                \
   stream_##name##_enabled_ = false;