ServiceWorker: Enable UseCounter for ServiceWorkerGlobalScope

third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h

Index: third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
diff --git a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
index 99ba37f85c0409f7035b58d4c7dd2bf66da3aa05..e06bd92e04e3881741618a188d8e91d9a705c073 100644
--- a/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
+++ b/third_party/WebKit/public/web/modules/serviceworker/WebServiceWorkerContextClient.h
@@ -100,6 +100,10 @@ class WebServiceWorkerContextClient {
   // Called when the worker context is initialized.
   virtual void didInitializeWorkerContext(v8::Local<v8::Context> context) {}
 
+  // Called when some API to be recorded in UseCounter is called on the worker
+  // global scope.
+  virtual void countFeature(uint32_t feature) {}
+
   // Called when the WorkerGlobalScope had an error or an exception.
   virtual void reportException(const WebString& errorMessage,
                                int lineNumber,