cc: Copy category/arg names for tracing in BeginFrameTracker.

cc/scheduler/begin_frame_tracker.cc

Index: cc/scheduler/begin_frame_tracker.cc
diff --git a/cc/scheduler/begin_frame_tracker.cc b/cc/scheduler/begin_frame_tracker.cc
index 20e2c39376d83b2049bf119c63dab87ad1256dfa..dc18beaa4d37718623e61bbdb9581dc609271a9c 100644
--- a/cc/scheduler/begin_frame_tracker.cc
+++ b/cc/scheduler/begin_frame_tracker.cc
@@ -23,7 +23,7 @@ void BeginFrameTracker::Start(BeginFrameArgs new_args) {
       new_args.frame_time.ToInternalValue(), location_string_);
 
   // Trace this specific begin frame tracker Start/Finish times.
-  TRACE_EVENT_ASYNC_BEGIN2(
+  TRACE_EVENT_COPY_ASYNC_BEGIN2(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
       location_string_.c_str(), new_args.frame_time.ToInternalValue(),
       "new args", new_args.AsValue(), "current args", current_args_.AsValue());
@@ -54,9 +54,9 @@ const BeginFrameArgs& BeginFrameTracker::Current() const {
 void BeginFrameTracker::Finish() {
   DCHECK(!HasFinished()) << "Tried to finish an already finished frame";
   current_finished_at_ = base::TimeTicks::Now();
-  TRACE_EVENT_ASYNC_END0(TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
-                         location_string_.c_str(),
-                         current_args_.frame_time.ToInternalValue());
+  TRACE_EVENT_COPY_ASYNC_END0(
+      TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"),
+      location_string_.c_str(), current_args_.frame_time.ToInternalValue());
 }
 
 const BeginFrameArgs& BeginFrameTracker::Last() const {