[Tracing Clock Sync] Implement clock sync in Chrome

base/trace_event/tracing_agent.h

Index: base/trace_event/tracing_agent.h
diff --git a/base/trace_event/tracing_agent.h b/base/trace_event/tracing_agent.h
index 05f44a6ee9c04952f94af1d395f20139743ce732..f8ca78e92dbd07240210249b89db2ed4ecb21b5a 100644
--- a/base/trace_event/tracing_agent.h
+++ b/base/trace_event/tracing_agent.h
@@ -32,8 +32,8 @@ class BASE_EXPORT TracingAgent {
       const scoped_refptr<base::RefCountedString>& events_str_ptr)>;
   using RecordClockSyncMarkerCallback = base::Callback<void(
       int sync_id,
-      const TimeTicks& sync_ts,
-      const TimeTicks& sync_end_ts)>;
+      const TimeTicks& issue_ts,
+      const TimeTicks& issue_end_ts)>;
 
   virtual ~TracingAgent();