Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

content/browser/service_worker/service_worker_provider_host.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_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_
 
 #include <set>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/common/content_export.h"
 #include "webkit/common/resource_type.h"
 
+namespace ipc {
+class Sender;
+}
+
 namespace content {
 
 class ServiceWorkerContextCore;
+class ServiceWorkerDispatcherHost;
 class ServiceWorkerVersion;
 
 // This class is the browser-process representation of a serice worker
 // provider. There is a provider per document and the lifetime of this
 // object is tied to the lifetime of its document in the renderer process.
 // This class holds service worker state this is scoped to an individual
 // document.
 class CONTENT_EXPORT ServiceWorkerProviderHost
     : public base::SupportsWeakPtr<ServiceWorkerProviderHost> {
  public:
   ServiceWorkerProviderHost(int process_id,
                             int provider_id,
-                            base::WeakPtr<ServiceWorkerContextCore> context);
+                            base::WeakPtr<ServiceWorkerContextCore> context,
+                            ServiceWorkerDispatcherHost* dispatcher_host);
   ~ServiceWorkerProviderHost();
 
   int process_id() const { return process_id_; }
   int provider_id() const { return provider_id_; }
   const std::set<int>& script_client_thread_ids() const {
     return script_client_thread_ids_;
   }
 
   // The service worker version that corresponds with
   // navigator.serviceWorker.active for our document.
   ServiceWorkerVersion* active_version() const {
     return active_version_.get();
   }
 
   // The version, if any, that this provider is providing resource loads for.
   // This host observes resource loads made by the serviceworker itself.
   ServiceWorkerVersion* hosted_version() const {
     return hosted_version_.get();
   }
 
   void set_document_url(const GURL& url) { document_url_ = url; }
   const GURL& document_url() const { return document_url_; }
 
   // Adds and removes script client thread ID, who is listening events
   // dispatched from ServiceWorker to the document (and any of its dedicated
   // workers) corresponding to this provider.
   void AddScriptClient(int thread_id);
   void RemoveScriptClient(int thread_id);
 
-  // Associate |version| to this provider as its '.active' or '.pending'
-  // version.
+  // Associate |version| to this provider as its '.active' or '.pending'.
   // Giving NULL to this method will unset the corresponding field.
   void SetActiveVersion(ServiceWorkerVersion* version);
   void SetPendingVersion(ServiceWorkerVersion* version);
 
   // Returns false if the version is not in the expected STARTING in our
   // our process state. That would be indicative of a bad IPC message.
   bool SetHostedVersionId(int64 versions_id);
 
   // Returns true if this provider host should handle requests for
   // |resource_type|.
   bool ShouldHandleRequest(ResourceType::Type resource_type) const;
 
  private:
   const int process_id_;
   const int provider_id_;
   GURL document_url_;
   std::set<int> script_client_thread_ids_;
   scoped_refptr<ServiceWorkerVersion> active_version_;
   scoped_refptr<ServiceWorkerVersion> pending_version_;
   scoped_refptr<ServiceWorkerVersion> hosted_version_;
   base::WeakPtr<ServiceWorkerContextCore> context_;
+  ServiceWorkerDispatcherHost* dispatcher_host_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerProviderHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_