Delete the tracing service

components/filesystem/file_system_app.cc

 // 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.
 
 #include "components/filesystem/file_system_app.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
@@ skipping 25 matching lines @@
 const char kUserDataDir[] = "user-data-dir";
 
 }  // namespace filesystem
 
 FileSystemApp::FileSystemApp() : lock_table_(new LockTable) {
   registry_.AddInterface<mojom::FileSystem>(this);
 }
 
 FileSystemApp::~FileSystemApp() {}
 
-void FileSystemApp::OnStart() {
-  tracing_.Initialize(context()->connector(), context()->identity().name());
-}
+void FileSystemApp::OnStart() {}
 
 void FileSystemApp::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));
 }
 
 // |InterfaceFactory<Files>| implementation:
@@ skipping 29 matching lines @@
     path = path.Append(FILE_PATH_LITERAL("filesystem"));
   }
 
   if (!base::PathExists(path))
     base::CreateDirectory(path);
 
   return path;
 }
 
 }  // namespace filesystem