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

mash/quick_launch/quick_launch.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/quick_launch/quick_launch.h"
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string16.h"
@@ skipping 148 matching lines @@
 QuickLaunch::~QuickLaunch() {}
 
 void QuickLaunch::RemoveWindow(views::Widget* window) {
   auto it = std::find(windows_.begin(), windows_.end(), window);
   DCHECK(it != windows_.end());
   windows_.erase(it);
   if (windows_.empty() && base::MessageLoop::current()->is_running())
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
-void QuickLaunch::OnStart() {
-  tracing_.Initialize(context()->connector(), context()->identity().name());
+void QuickLaunch::OnStart(service_manager::ServiceContext* context) {
+  context_ = context;
+  tracing_.Initialize(context->connector(), context->identity().name());
 
   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());
 
   Launch(mojom::kWindow, mojom::LaunchMode::MAKE_NEW);
 }
 
 bool QuickLaunch::OnConnect(const service_manager::ServiceInfo& remote_info,
                             service_manager::InterfaceRegistry* registry) {
   registry->AddInterface<mojom::Launchable>(this);
   return true;
 }
 
 void QuickLaunch::Launch(uint32_t what, mojom::LaunchMode how) {
   bool reuse = how == mojom::LaunchMode::REUSE ||
                how == mojom::LaunchMode::DEFAULT;
   if (reuse && !windows_.empty()) {
     windows_.back()->Activate();
     return;
   }
   catalog::mojom::CatalogPtr catalog;
-  context()->connector()->ConnectToInterface("service:catalog", &catalog);
+  context_->connector()->ConnectToInterface("service:catalog", &catalog);
 
   views::Widget* window = views::Widget::CreateWindowWithContextAndBounds(
-      new QuickLaunchUI(this, context()->connector(), std::move(catalog)),
+      new QuickLaunchUI(this, context_->connector(), std::move(catalog)),
       nullptr, gfx::Rect(10, 640, 0, 0));
   window->Show();
   windows_.push_back(window);
 }
 
 void QuickLaunch::Create(const service_manager::Identity& remote_identity,
                          mojom::LaunchableRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 }  // namespace quick_launch
 }  // namespace mash