[ServiceWorker] Add EmbeddedWorkerInstanceHost Interface.

content/renderer/service_worker/embedded_worker_dispatcher.h

-// Copyright 2013 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 CONTENT_RENDERER_SERVICE_WORKER_EMBEDDED_WORKER_DISPATCHER_H_
-#define CONTENT_RENDERER_SERVICE_WORKER_EMBEDDED_WORKER_DISPATCHER_H_
-
-#include <map>
-#include <memory>
-
-#include "base/id_map.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "base/time/time.h"
-#include "content/child/scoped_child_process_reference.h"
-#include "ipc/ipc_listener.h"
-
-namespace blink {
-
-class WebEmbeddedWorker;
-
-}  // namespace blink
-
-namespace content {
-
-class EmbeddedWorkerDevToolsAgent;
-class ServiceWorkerContextClient;
-struct EmbeddedWorkerStartParams;
-
-// A tiny dispatcher which handles embedded worker start/stop messages.
-class EmbeddedWorkerDispatcher : public IPC::Listener {
- public:
-  EmbeddedWorkerDispatcher();
-  ~EmbeddedWorkerDispatcher() override;
-
-  // IPC::Listener overrides.
-  bool OnMessageReceived(const IPC::Message& message) override;
-
-  void WorkerContextDestroyed(int embedded_worker_id);
-
- private:
-  friend class EmbeddedWorkerInstanceClientImpl;
-
-  // A thin wrapper of WebEmbeddedWorker which also adds and releases process
-  // references automatically.
-  class WorkerWrapper {
-   public:
-    WorkerWrapper(blink::WebEmbeddedWorker* worker,
-                  int devtools_agent_route_id);
-    ~WorkerWrapper();
-
-    blink::WebEmbeddedWorker* worker() { return worker_.get(); }
-    EmbeddedWorkerDevToolsAgent* devtools_agent() {
-      return devtools_agent_.get();
-    }
-
-   private:
-    ScopedChildProcessReference process_ref_;
-    std::unique_ptr<blink::WebEmbeddedWorker> worker_;
-    std::unique_ptr<EmbeddedWorkerDevToolsAgent> devtools_agent_;
-  };
-
-  void OnStopWorker(int embedded_worker_id);
-
-  std::unique_ptr<WorkerWrapper> StartWorkerContext(
-      const EmbeddedWorkerStartParams& params,
-      std::unique_ptr<ServiceWorkerContextClient> context_client);
-
-  // These methods are used by EmbeddedWorkerInstanceClientImpl to keep
-  // consistency between chromium IPC and mojo IPC.
-  // TODO(shimazu): Remove them after all messages for EmbeddedWorker are
-  // replaced by mojo IPC. (Tracking issue: https://crbug.com/629701)
-  void RegisterWorker(int embedded_worker_id,
-                      std::unique_ptr<WorkerWrapper> wrapper);
-  void UnregisterWorker(int embedded_worker_id);
-  void RecordStopWorkerTimer(int embedded_worker_id);
-
-  IDMap<std::unique_ptr<WorkerWrapper>> workers_;
-  std::map<int /* embedded_worker_id */, base::TimeTicks> stop_worker_times_;
-  base::WeakPtrFactory<EmbeddedWorkerDispatcher> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerDispatcher);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_SERVICE_WORKER_EMBEDDED_WORKER_DISPATCHER_H_