Revert of Service Manager: Remove ServiceContext* arg from Service::OnStart()

mash/init/init.cc

 // Copyright 2016 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 "mash/init/init.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/guid.h"
 #include "mash/login/public/interfaces/login.mojom.h"
 #include "services/service_manager/public/cpp/connection.h"
 #include "services/service_manager/public/cpp/connector.h"
 #include "services/service_manager/public/cpp/interface_registry.h"
 #include "services/service_manager/public/cpp/service_context.h"
 
 namespace mash {
 namespace init {
 
 Init::Init() {}
 Init::~Init() {}
 
-void Init::OnStart() {
-  context()->connector()->Connect("service:ui");
+void Init::OnStart(service_manager::ServiceContext* context) {
+  context_ = context;
+  context->connector()->Connect("service:ui");
   StartTracing();
   StartLogin();
 }
 
 bool Init::OnConnect(const service_manager::ServiceInfo& remote_info,
                      service_manager::InterfaceRegistry* registry) {
   registry->AddInterface<mojom::Init>(this);
   return true;
 }
 
 void Init::StartService(const std::string& name, const std::string& user_id) {
   if (user_services_.find(user_id) == user_services_.end()) {
     service_manager::Connector::ConnectParams params(
         service_manager::Identity(name, user_id));
     std::unique_ptr<service_manager::Connection> connection =
-        context()->connector()->Connect(&params);
+        context_->connector()->Connect(&params);
     connection->SetConnectionLostClosure(
         base::Bind(&Init::UserServiceQuit, base::Unretained(this), user_id));
     user_services_[user_id] = std::move(connection);
   }
 }
 
 void Init::StopServicesForUser(const std::string& user_id) {
   auto it = user_services_.find(user_id);
   if (it != user_services_.end())
     user_services_.erase(it);
 }
 
 void Init::Create(const service_manager::Identity& remote_identity,
                   mojom::InitRequest request) {
   init_bindings_.AddBinding(this, std::move(request));
 }
 
 void Init::UserServiceQuit(const std::string& user_id) {
   auto it = user_services_.find(user_id);
   DCHECK(it != user_services_.end());
   user_services_.erase(it);
 }
 
 void Init::StartTracing() {
-  context()->connector()->Connect("service:tracing");
+  context_->connector()->Connect("service:tracing");
 }
 
 void Init::StartLogin() {
-  login_connection_ = context()->connector()->Connect("service:login");
+  login_connection_ = context_->connector()->Connect("service:login");
   mash::login::mojom::LoginPtr login;
   login_connection_->GetInterface(&login);
   login->ShowLoginUI();
 }
 
 }  // namespace init
 }  // namespace main