Delete the tracing service

mash/browser/browser.cc

Index: mash/browser/browser.cc
diff --git a/mash/browser/browser.cc b/mash/browser/browser.cc
index 91911cfcb34a5cc787500b316e13672d60e7a150..a1869dc66f9cff350047c23633affb59c41b4091 100644
--- a/mash/browser/browser.cc
+++ b/mash/browser/browser.cc
@@ -25,7 +25,6 @@
 #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/window.h"
 #include "ui/base/models/menu_model.h"
 #include "ui/gfx/canvas.h"
@@ -880,8 +879,6 @@ std::unique_ptr<navigation::View> Browser::CreateView() {
 }
 
 void Browser::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);