Worker: Enable UseCounter for SharedWorkerGlobalScope

content/renderer/shared_worker/websharedworker_proxy.h

 // Copyright (c) 2012 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_RENDERER_SHARED_WORKER_WEBSHAREDWORKER_PROXY_H_
 #define CONTENT_RENDERER_SHARED_WORKER_WEBSHAREDWORKER_PROXY_H_
 
+#include <set>
+
 #include "base/macros.h"
 #include "ipc/ipc_listener.h"
 #include "third_party/WebKit/public/web/WebSharedWorkerConnectListener.h"
 #include "third_party/WebKit/public/web/WebSharedWorkerCreationErrors.h"
 
 struct ViewHostMsg_CreateWorker_Params;
 
 namespace blink {
 class WebMessagePortChannel;
 }
 
 namespace IPC {
 class MessageRouter;
 }
 
 namespace content {
 
-// Implementation of the WebSharedWorker APIs. This object is intended to only
-// live long enough to allow the caller to send a "connect" event to the worker
-// thread. Once the connect event has been sent, all future communication will
-// happen via the WebMessagePortChannel. This instance will self-destruct when a
-// connection is established.
+// A proxy between a renderer process hosting a document and the browser
+// process. This instance has the same lifetime as a shared worker, and
+// self-destructs when the worker is destroyed.
 class WebSharedWorkerProxy : private IPC::Listener {
  public:
   // |channel| should be passed with its ownership.
   WebSharedWorkerProxy(
       std::unique_ptr<blink::WebSharedWorkerConnectListener> listener,
       ViewHostMsg_CreateWorker_Params params,
       blink::WebMessagePortChannel* channel);
   ~WebSharedWorkerProxy() override;
 
  private:
   void connect(ViewHostMsg_CreateWorker_Params params,
                blink::WebMessagePortChannel* channel);
 
   // IPC::Listener implementation.
   bool OnMessageReceived(const IPC::Message& message) override;
 
   void OnWorkerCreated();
   void OnWorkerScriptLoadFailed();
-  void OnWorkerConnected();
+  void OnWorkerConnected(std::set<uint32_t> features);
+  void OnWorkerDestroyed();
+  void OnCountFeature(uint32_t feature);
 
   // Routing id associated with this worker - used to receive messages from the
   // worker, and also to route messages to the worker (WorkerService contains
   // a map that maps between these renderer-side route IDs and worker-side
   // routing ids).
   int route_id_;
 
   IPC::MessageRouter* const router_;
 
   int message_port_id_;
   std::unique_ptr<blink::WebSharedWorkerConnectListener> listener_;
 
   DISALLOW_COPY_AND_ASSIGN(WebSharedWorkerProxy);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SHARED_WORKER_WEBSHAREDWORKER_PROXY_H_