Adding instrumentation to locate the source of jankiness.

net/udp/udp_socket_win.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 "net/udp/udp_socket_win.h"
 
 #include <mstcpip.h>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 131 matching lines @@
   // We grab an extra reference because there is an IO operation in progress.
   // Balanced in WriteDelegate::OnObjectSignaled().
   AddRef();
   write_watcher_.StartWatching(write_overlapped_.hEvent, &writer_);
 }
 
 void UDPSocketWin::Core::ReadDelegate::OnObjectSignaled(HANDLE object) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "UDPSocketWin_Core_ReadDelegate_OnObjectSignaled"));
+          "418183 UDPSocketWin::Core::ReadDelegate::OnObjectSignaled"));
 
   DCHECK_EQ(object, core_->read_overlapped_.hEvent);
   if (core_->socket_)
     core_->socket_->DidCompleteRead();
 
   core_->Release();
 }
 
 void UDPSocketWin::Core::WriteDelegate::OnObjectSignaled(HANDLE object) {
   // TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
   tracked_objects::ScopedTracker tracking_profile(
       FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "UDPSocketWin_Core_WriteDelegate_OnObjectSignaled"));
+          "418183 UDPSocketWin::Core::WriteDelegate::OnObjectSignaled"));
 
   DCHECK_EQ(object, core_->write_overlapped_.hEvent);
   if (core_->socket_)
     core_->socket_->DidCompleteWrite();
 
   core_->Release();
 }
 //-----------------------------------------------------------------------------
 
 QwaveAPI::QwaveAPI() : qwave_supported_(false) {
@@ skipping 834 matching lines @@
               NULL);
 
   return OK;
 }
 
 void UDPSocketWin::DetachFromThread() {
   base::NonThreadSafe::DetachFromThread();
 }
 
 }  // namespace net