[NOT FOR LANDING] Detailed loading traces

content/browser/loader/resource_scheduler.cc

 // Copyright (c) 2012 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 "content/browser/loader/resource_scheduler.h"
 
 #include <stdint.h>
 #include <set>
 #include <string>
 #include <utility>
@@ skipping 763 matching lines @@
 ResourceScheduler::~ResourceScheduler() {
   DCHECK(unowned_requests_.empty());
   DCHECK(client_map_.empty());
 }
 
 scoped_ptr<ResourceThrottle> ResourceScheduler::ScheduleRequest(
     int child_id,
     int route_id,
     bool is_async,
     net::URLRequest* url_request) {
+  TRACE_EVENT0("toplevel", "ResourceScheduler::ScheduleRequest");
   DCHECK(CalledOnValidThread());
   ClientId client_id = MakeClientId(child_id, route_id);
   scoped_ptr<ScheduledResourceRequest> request(new ScheduledResourceRequest(
       client_id, url_request, this,
       RequestPriorityParams(url_request->priority(), 0), is_async));
 
   ClientMap::iterator it = client_map_.find(client_id);
   if (it == client_map_.end()) {
     // There are several ways this could happen:
     // 1. <a ping> requests don't have a route_id.
@@ skipping 163 matching lines @@
   client->ReprioritizeRequest(scheduled_resource_request, old_priority_params,
                               new_priority_params);
 }
 
 ResourceScheduler::ClientId ResourceScheduler::MakeClientId(
     int child_id, int route_id) {
   return (static_cast<ResourceScheduler::ClientId>(child_id) << 32) | route_id;
 }
 
 }  // namespace content