Keep alive ServiceWorkers when devtools is attached

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index 9b1dc4d9e3bcd77bb4785f6a358383239cf0a8bb..37bb74a94494f052ad8fc907c15f01e66a5404b9 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -248,11 +248,15 @@ class CONTENT_EXPORT ServiceWorkerVersion
   void Doom();
   bool is_doomed() const { return is_doomed_; }
 
+  // If |keep_alive_mode| is set to true we don't run stop-worker-timer.
+  void SetKeepAliveMode(bool keep_alive);
+
  private:
   friend class base::RefCounted<ServiceWorkerVersion>;
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerControlleeRequestHandlerTest,
                            ActivateWaitingVersion);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerVersionTest, ScheduleStopWorker);
+  FRIEND_TEST_ALL_PREFIXES(ServiceWorkerVersionTest, KeepAlive);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerVersionTest, ListenerAvailability);
   typedef ServiceWorkerVersion self;
   typedef std::map<ServiceWorkerProviderHost*, int> ControlleeMap;
@@ -304,6 +308,10 @@ class CONTENT_EXPORT ServiceWorkerVersion
                                const std::vector<int>& sent_message_port_ids);
 
   void ScheduleStopWorker();
+  void CancelStopWorker();
+  void MaybeStopWorker();
+  bool HasInflightRequests() const;
+
   void DoomInternal();
 
   const int64 version_id_;
@@ -317,7 +325,8 @@ class CONTENT_EXPORT ServiceWorkerVersion
   std::vector<StatusCallback> stop_callbacks_;
   std::vector<base::Closure> status_change_callbacks_;
 
-  // Message callbacks.
+  // Message callbacks. (Update HasInflightRequests() too when you update this
+  // list.)
   IDMap<StatusCallback, IDMapOwnPointer> activate_callbacks_;
   IDMap<StatusCallback, IDMapOwnPointer> install_callbacks_;
   IDMap<FetchCallback, IDMapOwnPointer> fetch_callbacks_;
@@ -334,6 +343,7 @@ class CONTENT_EXPORT ServiceWorkerVersion
   base::OneShotTimer<ServiceWorkerVersion> stop_worker_timer_;
   base::OneShotTimer<ServiceWorkerVersion> update_timer_;
   bool is_doomed_;
+  bool keep_alive_mode_;
 
   base::WeakPtrFactory<ServiceWorkerVersion> weak_factory_;