More graceful shutdown for ArcSession.

components/arc/arc_bridge_service_impl.h

 // 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.
 
 #ifndef COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_
 #define COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/files/scoped_file.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/task_runner.h"
 #include "components/arc/arc_bridge_service.h"
 #include "components/arc/arc_session.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
 namespace base {
 class SequencedTaskRunner;
 class SingleThreadTaskRunner;
 }  // namespace base
 
 namespace arc {
 
 // Real IPC based ArcBridgeService that is used in production.
 class ArcBridgeServiceImpl : public ArcBridgeService,
                              public ArcSession::Observer {
  public:
   // This is the factory interface to inject ArcSession instance
   // for testing purpose.
   using ArcSessionFactory = base::Callback<std::unique_ptr<ArcSession>()>;
 
-  ArcBridgeServiceImpl();
+  explicit ArcBridgeServiceImpl(
+      const scoped_refptr<base::TaskRunner>& blocking_task_runner);
   ~ArcBridgeServiceImpl() override;
 
-  void HandleStartup() override;
-
-  void Shutdown() override;
+  // ArcBridgeService overrides:
+  void RequestStart() override;
+  void RequestStop() override;
+  void OnShutdown() override;
 
   // Inject a factory to create ArcSession instance for testing purpose.
   // |factory| must not be null.
   void SetArcSessionFactoryForTesting(const ArcSessionFactory& factory);
 
   // Returns the current ArcSession instance for testing purpose.
   ArcSession* GetArcSessionForTesting() { return arc_session_.get(); }
 
   // Normally, reconnecting after connection shutdown happens after a short
   // delay. When testing, however, we'd like it to happen immediately to avoid
@@ skipping 34 matching lines @@
 
   // WeakPtrFactory to use callbacks.
   base::WeakPtrFactory<ArcBridgeServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ArcBridgeServiceImpl);
 };
 
 }  // namespace arc
 
 #endif  // COMPONENTS_ARC_ARC_BRIDGE_SERVICE_IMPL_H_