mandoline: write this after lunch.

components/mus/example/mock_sysui/mock_sysui.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 "components/mus/example/mock_sysui/mock_sysui.h"
 
 #include "components/mus/public/cpp/property_type_converters.h"
 #include "mash/wm/public/interfaces/container.mojom.h"
 #include "mojo/application/public/cpp/application_connection.h"
 #include "mojo/application/public/cpp/application_impl.h"
@@ skipping 77 matching lines @@
 };
 
 }  // namespace
 
 MockSysUI::MockSysUI() {}
 
 MockSysUI::~MockSysUI() {
 }
 
 void MockSysUI::Initialize(mojo::ApplicationImpl* app) {
+  tracing_.Initialize(app);
+
   aura_init_.reset(new views::AuraInit(app, "views_mus_resources.pak"));
   views::WindowManagerConnection::Create(app);
 
   DesktopBackground::Create(app->shell());
   Shelf::Create(app->shell());
 }
 
 bool MockSysUI::ConfigureIncomingConnection(
     mojo::ApplicationConnection* connection) {
   return false;
 }