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

cc/scheduler/begin_frame_tracker.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/scheduler/begin_frame_tracker.h"
 
 namespace cc {
 
 BeginFrameTracker::BeginFrameTracker(const tracked_objects::Location& location)
     : location_(location),
       location_string_(location.ToString()),
       current_updated_at_(),
       current_args_(),
       current_finished_at_(base::TimeTicks::FromInternalValue(-1)) {}
 
 BeginFrameTracker::~BeginFrameTracker() {
 }
 
 void BeginFrameTracker::Start(BeginFrameArgs new_args) {
   // Trace the frame time being passed between BeginFrameTrackers.
   TRACE_EVENT_FLOW_STEP0(
       TRACE_DISABLED_BY_DEFAULT("cc.debug.scheduler.frames"), "BeginFrameArgs",
       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());
 
   // Check the new BeginFrameArgs are valid and monotonically increasing.
   DCHECK(new_args.IsValid());
   DCHECK_LE(current_args_.frame_time, new_args.frame_time);
 
   DCHECK(HasFinished())
       << "Tried to start a new frame before finishing an existing frame.";
@@ skipping 10 matching lines @@
   DCHECK(!HasFinished())
       << "Tried to use BeginFrameArgs after marking the frame finished.";
   DCHECK(current_args_.IsValid())
       << "Tried to use BeginFrameArgs before starting a frame!";
   return current_args_;
 }
 
 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 {
   DCHECK(current_args_.IsValid())
       << "Tried to use last BeginFrameArgs before starting a frame!";
   DCHECK(HasFinished())
       << "Tried to use last BeginFrameArgs before the frame is finished.";
   return current_args_;
 }
 
@@ skipping 43 matching lines @@
 
 const BeginFrameArgs& BeginFrameTracker::DangerousMethodCurrentOrLast() const {
   if (!HasFinished()) {
     return Current();
   } else {
     return Last();
   }
 }
 
 }  // namespace cc