Delete the tracing service

mash/webtest/webtest.cc

 // Copyright 2016 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 "mash/webtest/webtest.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/memory/weak_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/timer/timer.h"
 #include "mash/public/interfaces/launchable.mojom.h"
 #include "services/navigation/public/interfaces/view.mojom.h"
 #include "services/service_manager/public/c/main.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/service.h"
 #include "services/service_manager/public/cpp/service_context.h"
 #include "services/service_manager/public/cpp/service_runner.h"
-#include "services/tracing/public/cpp/provider.h"
 #include "ui/aura/mus/window_port_mus.h"
 #include "ui/aura/window.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/paint_throbber.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/textfield/textfield.h"
 #include "ui/views/controls/textfield/textfield_controller.h"
 #include "ui/views/mus/aura_init.h"
@@ skipping 129 matching lines @@
 
 void Webtest::RemoveWindow(views::Widget* window) {
   auto it = std::find(windows_.begin(), windows_.end(), window);
   DCHECK(it != windows_.end());
   windows_.erase(it);
   if (windows_.empty())
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 void Webtest::OnStart() {
-  tracing_.Initialize(context()->connector(), context()->identity().name());
   aura_init_ = base::MakeUnique<views::AuraInit>(
       context()->connector(), context()->identity(), "views_mus_resources.pak",
       std::string(), nullptr, views::AuraInit::Mode::AURA_MUS);
 }
 
 void Webtest::OnBindInterface(const service_manager::ServiceInfo& source_info,
                               const std::string& interface_name,
                               mojo::ScopedMessagePipeHandle interface_pipe) {
   registry_.BindInterface(source_info.identity, interface_name,
                           std::move(interface_pipe));
@@ skipping 21 matching lines @@
   AddWindow(window);
 }
 
 void Webtest::Create(const service_manager::Identity& remote_identity,
                      mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace webtest
 }  // namespace mash