From 403337ebb893380101d1fa9cc435ce9b6cfeb22c Mon Sep 17 00:00:00 2001
From: Jason Simmons <jason-simmons@users.noreply.github.com>
Date: Thu, 14 Mar 2019 12:49:42 -0700
Subject: [PATCH] Do not pass short-lived buffers as labels to
 Dart_TimelineEvent (#8166)

Dart no longer makes a copy of the label string when recording events.

See https://github.com/flutter/engine/pull/8152
---
 fml/trace_event.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fml/trace_event.h b/fml/trace_event.h
index b8063aca3a2..1f979d4e35e 100644
--- a/fml/trace_event.h
+++ b/fml/trace_event.h
@@ -205,12 +205,12 @@ void TraceEventFlowEnd0(TraceArg category_group, TraceArg name, TraceIDArg id);
 
 class ScopedInstantEnd {
  public:
-  ScopedInstantEnd(std::string str) : label_(std::move(str)) {}
+  ScopedInstantEnd(const char* str) : label_(str) {}
 
-  ~ScopedInstantEnd() { TraceEventEnd(label_.c_str()); }
+  ~ScopedInstantEnd() { TraceEventEnd(label_); }
 
  private:
-  const std::string label_;
+  const char* label_;
 
   FML_DISALLOW_COPY_AND_ASSIGN(ScopedInstantEnd);
 };