[NOT FOR LANDING] Detailed loading traces

content/browser/devtools/devtools_netlog_observer.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/devtools/devtools_netlog_observer.h"
 
 #include <stddef.h>
-
+#include "base/trace_event/trace_event.h"
 #include "base/strings/string_util.h"
 #include "base/values.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/resource_response.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "net/spdy/spdy_header_block.h"
@@ skipping 164 matching lines @@
 DevToolsNetLogObserver* DevToolsNetLogObserver::GetInstance() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   return instance_;
 }
 
 // static
 void DevToolsNetLogObserver::PopulateResponseInfo(
     net::URLRequest* request,
     ResourceResponse* response) {
+  TRACE_EVENT0("toplevel", "DevToolsNetLogObserver::PopulateResponseInfo");
   const ResourceRequestInfoImpl* request_info =
       ResourceRequestInfoImpl::ForRequest(request);
   if (!request_info || !request_info->ShouldReportRawHeaders())
     return;
 
   uint32_t source_id = request->net_log().source().id;
   DevToolsNetLogObserver* dev_tools_net_log_observer =
       DevToolsNetLogObserver::GetInstance();
   if (dev_tools_net_log_observer == NULL)
     return;
   response->head.devtools_info =
       dev_tools_net_log_observer->GetResourceInfo(source_id);
 }
 
 }  // namespace content