Delete the tracing service

components/font_service/font_service_app.h

 // 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.
 
 #ifndef COMPONENTS_FONT_SERVICE_FONT_SERVICE_APP_H_
 #define COMPONENTS_FONT_SERVICE_FONT_SERVICE_APP_H_
 
 #include <stdint.h>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/font_service/public/interfaces/font_service.mojom.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
-#include "services/tracing/public/cpp/provider.h"
 #include "skia/ext/skia_utils_base.h"
 
 namespace font_service {
 
 class FontServiceApp
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::FontService>,
       public mojom::FontService {
  public:
   FontServiceApp();
@@ skipping 15 matching lines @@
                        mojom::TypefaceStylePtr requested_style,
                        const MatchFamilyNameCallback& callback) override;
   void OpenStream(uint32_t id_number,
                   const OpenStreamCallback& callback) override;
 
   int FindOrAddPath(const SkString& path);
 
   service_manager::BinderRegistry registry_;
   mojo::BindingSet<mojom::FontService> bindings_;
 
-  tracing::Provider tracing_;
-
   // We don't want to leak paths to our callers; we thus enumerate the paths of
   // fonts.
   std::vector<SkString> paths_;
 
   DISALLOW_COPY_AND_ASSIGN(FontServiceApp);
 };
 
 }  // namespace font_service
 
 #endif  // COMPONENTS_FONT_SERVICE_FONT_SERVICE_APP_H_