ServiceWorker: Enable UseCounter for ServiceWorkerGlobalScope

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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 216 matching lines @@
 
   // Returns true if the context referred to by this host (i.e. |context_|) is
   // still alive.
   bool IsContextAlive();
 
   // Dispatches message event to the document.
   void PostMessageToClient(ServiceWorkerVersion* version,
                            const base::string16& message,
                            const std::vector<int>& sent_message_ports);
 
+  // Notifies an API use on the worker to the controllee's use counter. This
+  // should be called only on controllee's provider host.

[falken, 2017/02/09 06:03:58]

It's a little hard to parse this. Suggestion: "Notifies the client that its
controller used a feature, for UseCounter purposes. This can only be called if
IsProviderForClient() is true."

[nhiroki, 2017/02/13 05:42:09]

Done.

+  void CountFeature(uint32_t feature);
+
   // Adds reference of this host's process to the |pattern|, the reference will
   // be removed in destructor.
   void AddScopedProcessReferenceToPattern(const GURL& pattern);
 
   // |registration| claims the document to be controlled.
   void ClaimedByRegistration(ServiceWorkerRegistration* registration);
 
   // Called by dispatcher host to get the registration for the "ready" property.
   // Returns false if there's a completed or ongoing request for the document.
   // https://slightlyoff.github.io/ServiceWorker/spec/service_worker/#navigator-service-worker-ready
@@ skipping 159 matching lines @@
   bool allow_association_;
 
   std::vector<base::Closure> queued_events_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerProviderHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_PROVIDER_HOST_H_