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..9321ab757c37b964e7e5fe3ac2c6120c3dacddd1 100644
--- a/content/browser/service_worker/service_worker_provider_host.h
+++ b/content/browser/service_worker/service_worker_provider_host.h
@@ -234,6 +234,9 @@ class CONTENT_EXPORT ServiceWorkerProviderHost
                            const base::string16& message,
                            const std::vector<int>& sent_message_ports);
 
+  // Notifies an API use to the document.

[falken, 2017/02/08 05:01:53]

What is "the document" here? Does this mean this should only be used for
SERVICE_WORKER_PROVIDER_FOR_WINDOW?

[nhiroki, 2017/02/09 05:11:31]

No, this can be called for any controllee type. Updated this comment and added
DCHECK.

+  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);