Make Service own ServiceContext.

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 21 matching lines @@
 namespace {
 
 const char kUserDataDir[] = "user-data-dir";
 
 }  // namespace filesystem
 
 FileSystemApp::FileSystemApp() : lock_table_(new LockTable) {}
 
 FileSystemApp::~FileSystemApp() {}
 
-void FileSystemApp::OnStart(shell::Connector* connector,
-                            const shell::Identity& identity,
-                            uint32_t id) {
-  tracing_.Initialize(connector, identity.name());
+void FileSystemApp::OnStart(const shell::Identity& identity) {
+  tracing_.Initialize(connector(), identity.name());
 }
 
 bool FileSystemApp::OnConnect(shell::Connection* connection) {
   connection->AddInterface<mojom::FileSystem>(this);
   return true;
 }
 
 // |InterfaceFactory<Files>| implementation:
 void FileSystemApp::Create(const shell::Identity& remote_identity,
                            mojo::InterfaceRequest<mojom::FileSystem> request) {
@@ skipping 26 matching lines @@
     path = path.Append(FILE_PATH_LITERAL("filesystem"));
   }
 
   if (!base::PathExists(path))
     base::CreateDirectory(path);
 
   return path;
 }
 
 }  // namespace filesystem