Make Service own ServiceContext.

mash/browser/browser.h

 // 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.
 
 #ifndef MASH_BROWSER_BROWSER_H_
 #define MASH_BROWSER_BROWSER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 25 matching lines @@
   // Start/stop tracking individual browser windows. When we no longer track any
   // browser windows, the application terminates. The Browser object does not
   // own these widgets.
   void AddWindow(views::Widget* window);
   void RemoveWindow(views::Widget* window);
 
   std::unique_ptr<navigation::View> CreateView();
 
  private:
   // shell::Service:
-  void OnStart(shell::Connector* connector,
-               const shell::Identity& identity,
-               uint32_t id) override;
+  void OnStart(const shell::Identity& identity) override;
   bool OnConnect(shell::Connection* connection) override;
 
   // mojom::Launchable:
   void Launch(uint32_t what, mojom::LaunchMode how) override;
 
   // shell::InterfaceFactory<mojom::Launchable>:
   void Create(const shell::Identity& remote_identity,
               mojom::LaunchableRequest request) override;
 
-  shell::Connector* connector_ = nullptr;
   mojo::BindingSet<mojom::Launchable> bindings_;
   std::vector<views::Widget*> windows_;
 
   mojo::TracingImpl tracing_;
   std::unique_ptr<views::AuraInit> aura_init_;
   std::unique_ptr<views::WindowManagerConnection> window_manager_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 }  // namespace browser
 }  // namespace mash
 
 #endif  // MASH_BROWSER_BROWSER_H_