mandoline: write this after lunch.

mojo/services/network/network_service_delegate.cc

 // Copyright 2015 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 "mojo/services/network/network_service_delegate.h"
 
 #include "base/at_exit.h"
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 111 matching lines @@
   } else {
     CHECK(PathService::Get(base::DIR_TEMP, &base_path));
     base_path = base_path.Append(FILE_PATH_LITERAL("network_service"));
   }
 
   scoped_refptr<base::SequencedTaskRunner> worker_thread;
 #if !defined(OS_ANDROID)
   worker_thread = io_worker_thread_->task_runner();
 #endif
   context_.reset(new NetworkContext(base_path, worker_thread, this));
+  tracing_.Initialize(app);
 }
 
 bool NetworkServiceDelegate::ConfigureIncomingConnection(
     ApplicationConnection* connection) {
   DCHECK(context_);
   connection->AddService<CookieStore>(this);
   connection->AddService<NetworkService>(this);
   connection->AddService<URLLoaderFactory>(this);
   connection->AddService<WebSocketFactory>(this);
   return true;
@@ skipping 55 matching lines @@
     FOR_EACH_OBSERVER(NetworkServiceDelegateObserver, observers_,
                       OnIOWorkerThreadShutdown());
 
     // Destroy the io worker thread here so that we can commit any pending
     // cookies here.
     io_worker_thread_.reset();
   }
 }
 
 }  // namespace mojo