Speculatively launch Service Workers on mouse/touch events. [4/5]

content/browser/service_worker/service_worker_version.h

Index: content/browser/service_worker/service_worker_version.h
diff --git a/content/browser/service_worker/service_worker_version.h b/content/browser/service_worker/service_worker_version.h
index db5392c1fcd62226bbc6a6b777293a67979c1e15..bb9cb5d21cf75b67a01030ba04506289bc48da07 100644
--- a/content/browser/service_worker/service_worker_version.h
+++ b/content/browser/service_worker/service_worker_version.h
@@ -651,6 +651,10 @@ class CONTENT_EXPORT ServiceWorkerVersion
   // event ended).
   void OnBeginEvent();
 
+  // Resets |start_worker_first_purpose_| and fires and clears all start
+  // callbacks.
+  void FinishStartWorker(ServiceWorkerStatusCode status);
+
   const int64_t version_id_;
   const int64_t registration_id_;
   const GURL script_url_;
@@ -727,6 +731,10 @@ class CONTENT_EXPORT ServiceWorkerVersion
 
   bool stop_when_devtools_detached_ = false;
 
+  // Keeps the first purpose of starting the worker for UMA. Cleared in
+  // FinishStartWorker().
+  std::unique_ptr<ServiceWorkerMetrics::EventType> start_worker_first_purpose_;

[nhiroki, 2016/07/28 05:38:37]

base::Optional<ServiceWorkerMetrics::EventType> could work?
https://chromium.googlesource.com/chromium/src/+/master/docs/optional.md

[horo, 2016/07/28 08:15:48]

Done.

+
   base::WeakPtrFactory<ServiceWorkerVersion> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerVersion);