mandoline: Add automatic tracing at mojo call sites.

components/mus/mus_app.h

 // 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.
 
 #ifndef COMPONENTS_MUS_MUS_APP_H_
 #define COMPONENTS_MUS_MUS_APP_H_
 
 #include <set>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 67 matching lines @@
               mojo::InterfaceRequest<mojom::Gpu> request) override;
 
   // mojom::WindowTreeHostFactory implementation.
   void CreateWindowTreeHost(mojo::InterfaceRequest<mojom::WindowTreeHost> host,
                             mojom::WindowTreeHostClientPtr host_client,
                             mojom::WindowTreeClientPtr tree_client) override;
 
   mojo::WeakBindingSet<mojom::WindowTreeHostFactory> factory_bindings_;
   mojo::ApplicationImpl* app_impl_;
   scoped_ptr<ws::ConnectionManager> connection_manager_;
-  mojo::TracingImpl tracing_;
   scoped_refptr<GpuState> gpu_state_;
   scoped_ptr<ui::PlatformEventSource> event_source_;
 
   // Surfaces
   scoped_refptr<SurfacesState> surfaces_state_;
 
   DISALLOW_COPY_AND_ASSIGN(MandolineUIServicesApp);
 };
 
 }  // namespace mus
 
 #endif  // COMPONENTS_MUS_MUS_APP_H_