[NOT FOR REVIEW] Instrument net/ with trace events.

net/socket/client_socket_handle.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/socket/client_socket_handle.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "net/base/net_errors.h"
 #include "net/socket/client_socket_pool.h"
 
+#include "base/trace_event/trace_event.h"
+
 namespace net {
 
 ClientSocketHandle::ClientSocketHandle()
     : is_initialized_(false),
       pool_(NULL),
       higher_pool_(NULL),
       reuse_type_(ClientSocketHandle::UNUSED),
       callback_(base::Bind(&ClientSocketHandle::OnIOComplete,
                            base::Unretained(this))),
       is_ssl_error_(false),
@@ skipping 107 matching lines @@
 
   load_timing_info->connect_timing = connect_timing_;
   return true;
 }
 
 void ClientSocketHandle::SetSocket(scoped_ptr<StreamSocket> s) {
   socket_ = std::move(s);
 }
 
 void ClientSocketHandle::OnIOComplete(int result) {
+  TRACE_EVENT0("net", "net::ClientSocketHandle::OnIOComplete");
   CompletionCallback callback = user_callback_;
   user_callback_.Reset();
   HandleInitCompletion(result);
   callback.Run(result);
 }
 
 scoped_ptr<StreamSocket> ClientSocketHandle::PassSocket() {
   return std::move(socket_);
 }
 
@@ skipping 14 matching lines @@
   // TODO(eroman): This logging is not complete, in particular set_socket() and
   // release() socket. It ends up working though, since those methods are being
   // used to layer sockets (and the destination sources are the same).
   DCHECK(socket_.get());
   socket_->NetLog().BeginEvent(
       NetLog::TYPE_SOCKET_IN_USE,
       requesting_source_.ToEventParametersCallback());
 }
 
 }  // namespace net