ServiceWorker: Enable UseCounter for ServiceWorkerGlobalScope

content/browser/service_worker/service_worker_provider_host.h

Index: content/browser/service_worker/service_worker_provider_host.h
diff --git a/content/browser/service_worker/service_worker_provider_host.h b/content/browser/service_worker/service_worker_provider_host.h
index 3ed67ba33f4abb82da49716386d9da2e94b86508..fcf44d59e86c60e04de236676c014153d2fa5e4e 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -234,6 +234,10 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
                            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);