Keep alive ServiceWorkers when devtools is attached

content/browser/service_worker/embedded_worker_instance.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_EMBEDDED_WORKER_INSTANCE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 68 matching lines @@
              const GURL& script_url,
              bool pause_after_download,
              const StatusCallback& callback);
 
   // Stops the worker. It is invalid to call this when the worker is
   // not in STARTING or RUNNING status.
   // This returns false if stopping a worker fails immediately, e.g. when
   // IPC couldn't be sent to the worker.
   ServiceWorkerStatusCode Stop();
 
+  // Stops the worker if the worker is not being debugged (i.e. devtools is
+  // not attached). This method is called by a stop-worker timer to kill
+  // idle workers.
+  void StopIfIdle();
+
   // Sends |message| to the embedded worker running in the child process.
   // It is invalid to call this while the worker is not in RUNNING status.
   ServiceWorkerStatusCode SendMessage(const IPC::Message& message);
 
   void ResumeAfterDownload();
 
   int embedded_worker_id() const { return embedded_worker_id_; }
   Status status() const { return status_; }
   int process_id() const { return process_id_; }
   int thread_id() const { return thread_id_; }
   int worker_devtools_agent_route_id() const {
     return worker_devtools_agent_route_id_;
   }
   MessagePortMessageFilter* message_port_message_filter() const;
 
   void AddListener(Listener* listener);
   void RemoveListener(Listener* listener);
 
+  void set_devtools_attached(bool attached) { devtools_attached_ = attached; }
+
  private:
   typedef ObserverList<Listener> ListenerList;
 
   friend class EmbeddedWorkerRegistry;
   FRIEND_TEST_ALL_PREFIXES(EmbeddedWorkerInstanceTest, StartAndStop);
 
   // Constructor is called via EmbeddedWorkerRegistry::CreateWorker().
   // This instance holds a ref of |registry|.
   EmbeddedWorkerInstance(base::WeakPtr<ServiceWorkerContextCore> context,
                          int embedded_worker_id);
@@ skipping 68 matching lines @@
   base::WeakPtr<ServiceWorkerContextCore> context_;
   scoped_refptr<EmbeddedWorkerRegistry> registry_;
   const int embedded_worker_id_;
   Status status_;
 
   // Current running information. -1 indicates the worker is not running.
   int process_id_;
   int thread_id_;
   int worker_devtools_agent_route_id_;
 
+  // Whether devtools is attached or not.
+  bool devtools_attached_;
+
   StatusCallback start_callback_;
 
   ListenerList listener_list_;
 
   base::WeakPtrFactory<EmbeddedWorkerInstance> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(EmbeddedWorkerInstance);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_EMBEDDED_WORKER_INSTANCE_H_