Populate .current when navigator.serviceWorker is accessed

content/common/service_worker/service_worker_messages.h

 // Copyright 2014 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.
 
 // Message definition file, included multiple times, hence no include guard.
 
 #include "base/strings/string16.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 63 matching lines @@
 
 // Informs the browser of a new ServiceWorkerProvider in the child process,
 // |provider_id| is unique within its child process.
 IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderCreated,
                      int /* provider_id */)
 
 // Informs the browser of a ServiceWorkerProvider being destroyed.
 IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ProviderDestroyed,
                      int /* provider_id */)
 
-// Informs the browser of a ServiceWorker object being destroyed.
-IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_ServiceWorkerObjectDestroyed,
+// Increments and decrements the ServiceWorker object's reference
+// counting in the browser side. The ServiceWorker object is created
+// with ref-count==1 initially.
+IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_IncrementServiceWorkerRefCount,
+                     int /* handle_id */)
+IPC_MESSAGE_CONTROL1(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount,
                      int /* handle_id */)
 
 // Informs the browser that |provider_id| is associated
 // with a service worker script running context and
 // |version_id| identifies which ServcieWorkerVersion.
 IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_SetVersionId,
                      int /* provider_id */,
                      int64 /* version_id */)
 
-// Informs the browser of a new scriptable API client in the child process.
-IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_AddScriptClient,
-                     int /* thread_id */,
-                     int /* provider_id */)
-
-// Informs the browser that the scriptable API client is unregistered.
-IPC_MESSAGE_CONTROL2(ServiceWorkerHostMsg_RemoveScriptClient,
-                     int /* thread_id */,
-                     int /* provider_id */)
-
 // Informs the browser that event handling has finished.
 // Routed to the target ServiceWorkerVersion.
 IPC_MESSAGE_ROUTED2(ServiceWorkerHostMsg_InstallEventFinished,
                     int /* request_id */,
                     blink::WebServiceWorkerEventResult)
 IPC_MESSAGE_ROUTED2(ServiceWorkerHostMsg_ActivateEventFinished,
                     int /* request_id */,
                     blink::WebServiceWorkerEventResult);
 IPC_MESSAGE_ROUTED3(ServiceWorkerHostMsg_FetchEventFinished,
                     int /* request_id */,
@@ skipping 60 matching lines @@
                      int /* request_id */)
 IPC_MESSAGE_CONTROL3(ServiceWorkerMsg_Message,
                      base::string16 /* message */,
                      std::vector<int> /* sent_message_port_ids */,
                      std::vector<int> /* new_routing_ids */)
 
 // Sent via EmbeddedWorker as a response of GetClientDocuments.
 IPC_MESSAGE_CONTROL2(ServiceWorkerMsg_DidGetClientDocuments,
                      int /* request_id */,
                      std::vector<int> /* client_ids */)