Wire provider_id into scriptable API provider to start listening events

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 "webkit/common/resource_type.h"
 
 namespace content {
 
 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 ServiceWorkerProviderHost
     : public base::SupportsWeakPtr<ServiceWorkerProviderHost> {
  public:
   ServiceWorkerProviderHost(int process_id,
                             int provider_id);
   ~ServiceWorkerProviderHost();
 
   int process_id() const { return process_id_; }
   int provider_id() const { return provider_id_; }
 
+  // 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);
+
   // The service worker version that corresponds with navigator.serviceWorker
   // for our document.
   ServiceWorkerVersion* associated_version() const {
     return  associated_version_.get();
   }
 
+  const std::set<int>& script_client_thread_ids() const {
+    return script_client_thread_ids_;
+  }
+
   // 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_;
+  std::set<int> script_client_thread_ids_;
   scoped_refptr<ServiceWorkerVersion> associated_version_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_