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

mash/screenlock/screenlock.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/screenlock/screenlock.h"
 
 #include "ash/public/cpp/shell_window_ids.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 57 matching lines @@
   views::MdTextButton* unlock_button_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenlockView);
 };
 
 }  // namespace
 
 Screenlock::Screenlock() {}
 Screenlock::~Screenlock() {}
 
-void Screenlock::OnStart(service_manager::ServiceContext* context) {
-  tracing_.Initialize(context->connector(), context->identity().name());
+void Screenlock::OnStart() {
+  tracing_.Initialize(context()->connector(), context()->identity().name());
 
   mash::session::mojom::SessionPtr session;
-  context->connector()->ConnectToInterface("service:mash_session", &session);
+  context()->connector()->ConnectToInterface("service:mash_session", &session);
   session->AddScreenlockStateListener(
       bindings_.CreateInterfacePtrAndBind(this));
 
   aura_init_ = base::MakeUnique<views::AuraInit>(
-      context->connector(), context->identity(), "views_mus_resources.pak");
+      context()->connector(), context()->identity(), "views_mus_resources.pak");
   window_manager_connection_ = views::WindowManagerConnection::Create(
-      context->connector(), context->identity());
+      context()->connector(), context()->identity());
 
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
-  params.delegate = new ScreenlockView(context->connector());
+  params.delegate = new ScreenlockView(context()->connector());
 
   std::map<std::string, std::vector<uint8_t>> properties;
   properties[ui::mojom::WindowManager::kInitialContainerId_Property] =
       mojo::ConvertTo<std::vector<uint8_t>>(
           ash::kShellWindowId_LockScreenContainer);
   ui::Window* window =
       views::WindowManagerConnection::Get()->NewTopLevelWindow(properties);
   params.native_widget = new views::NativeWidgetMus(
       widget, window, ui::mojom::CompositorFrameSinkType::DEFAULT);
   widget->Init(params);
   widget->Show();
 }
 
 bool Screenlock::OnConnect(
     const service_manager::ServiceInfo& remote_info,
     service_manager::InterfaceRegistry* registry) {
   return false;
 }
 
 void Screenlock::ScreenlockStateChanged(bool screen_locked) {
   if (!screen_locked)
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 }  // namespace screenlock
 }  // namespace mash