[corelib] dart:developer timeline flow events

runtime/vm/timeline_fuchsia.cc

Index: runtime/vm/timeline_fuchsia.cc
diff --git a/runtime/vm/timeline_fuchsia.cc b/runtime/vm/timeline_fuchsia.cc
index 0c37b087877e31b9f510c2f2ac59ee113d1a427a..5a13bf1956e0064223c47bab7e3bd85c0a457ce3 100644
--- a/runtime/vm/timeline_fuchsia.cc
+++ b/runtime/vm/timeline_fuchsia.cc
@@ -188,6 +188,38 @@ void DartTimelineEventHelpers::ReportCompleteEvent(Thread* thread,
   event->Complete();
 }
 
+void DartTimelineEventHelpers::ReportFlowEvent(Thread* thread,
+                                               Zone* zone,
+                                               TimelineEvent* event,
+                                               int64_t start,
+                                               int64_t start_cpu,
+                                               const char* category,
+                                               const char* name,
+                                               int64_t type,
+                                               int64_t flow_id,
+                                               const char* args) {
+  char* name_string = strdup(name);
+  ASSERT((type >= 0) && (type <= 2));
+  switch (type) {
+    case 0:
+      event->FlowBegin(name_string, flow_id, start);
+      break;
+    case 1:
+      event->FlowStep(name_string, flow_id, start);
+      break;
+    case 2:
+      event->FlowEnd(name_string, flow_id, start);
+      break;
+    default:
+      UNREACHABLE();
+      break;
+  }
+  event->set_owns_label(true);
+  event->SetNumArguments(1);
+  event->CopyArgument(0, "args", args);
+  event->Complete();
+}
+
 void DartTimelineEventHelpers::ReportInstantEvent(Thread* thread,
                                                   Zone* zone,
                                                   TimelineEvent* event,