mandoline: Add automatic tracing at mojo call sites.

components/mus/mus_app.cc

 // Copyright 2014 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/mus_app.h"
 
 #include "base/stl_util.h"
 #include "components/mus/gles2/gpu_impl.h"
 #include "components/mus/public/cpp/args.h"
 #include "components/mus/surfaces/surfaces_scheduler.h"
@@ skipping 30 matching lines @@
 
 MandolineUIServicesApp::~MandolineUIServicesApp() {
   if (gpu_state_)
     gpu_state_->StopControlThread();
   // Destroy |connection_manager_| first, since it depends on |event_source_|.
   connection_manager_.reset();
 }
 
 void MandolineUIServicesApp::Initialize(ApplicationImpl* app) {
   app_impl_ = app;
-  tracing_.Initialize(app);
   surfaces_state_ = new SurfacesState;
 
 #if defined(USE_X11)
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(kUseX11TestConfig)) {
     XInitThreads();
     ui::test::SetUseOverrideRedirectWindowByDefault(true);
   }
 #endif
 
@@ skipping 76 matching lines @@
       new ws::WindowTreeHostImpl(host_client.Pass(), connection_manager_.get(),
                                  app_impl_, gpu_state_, surfaces_state_);
 
   // WindowTreeHostConnection manages its own lifetime.
   host_impl->Init(new ws::WindowTreeHostConnectionImpl(
       host.Pass(), make_scoped_ptr(host_impl), tree_client.Pass(),
       connection_manager_.get()));
 }
 
 }  // namespace mus