Introduce ServiceWorker.ActivatedWorkerPreparationForMainFrame.Time UMA.

content/browser/service_worker/service_worker_context_core.cc

 // 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.
 
 #include "content/browser/service_worker/service_worker_context_core.h"
 
 #include <limits>
 #include <set>
 #include <utility>
 
@@ skipping 97 matching lines @@
       ServiceWorkerStatusCode status,
       const std::vector<ServiceWorkerRegistrationInfo>& registrations) {
     if (!context || status != SERVICE_WORKER_OK)
       return;
     // Make a copy of live versions map because StopWorker() removes the version
     // from it when we were starting up and don't have a process yet.
     const std::map<int64_t, ServiceWorkerVersion*> live_versions_copy =
         context->GetLiveVersions();
     for (const auto& version_itr : live_versions_copy) {
       ServiceWorkerVersion* version(version_itr.second);
-      if (version->running_status() == ServiceWorkerVersion::STARTING ||
-          version->running_status() == ServiceWorkerVersion::RUNNING) {
+      if (version->running_status() ==
+              ServiceWorkerVersion::RunningStatus::STARTING ||
+          version->running_status() ==
+              ServiceWorkerVersion::RunningStatus::RUNNING) {

[falken, 2016/06/07 03:46:12]

Should we use EmbeddedWorkerStatus:: for these uses now?

         version->StopWorker(
             base::Bind(&ClearAllServiceWorkersHelper::OnResult, this));
       }
     }
     for (const auto& registration_info : registrations) {
       context->UnregisterServiceWorker(
           registration_info.pattern,
           base::Bind(&ClearAllServiceWorkersHelper::OnResult, this));
     }
   }
@@ skipping 720 matching lines @@
 }
 
 void ServiceWorkerContextCore::OnRegistrationFinishedForCheckHasServiceWorker(
     const ServiceWorkerContext::CheckHasServiceWorkerCallback callback,
     const scoped_refptr<ServiceWorkerRegistration>& registration) {
   callback.Run(registration->active_version() ||
                registration->waiting_version());
 }
 
 }  // namespace content