service worker: Remove unused function ServiceWorkerMetrics::TimeToURLJob

Follow-up to r570238, https://crrev.com/e5bca9a7ce3d474

Bug: 855952
Change-Id: Id75e3e16a28fe53234d18b9ee04bb08c633d175a
TBR: shimazu
Reviewed-on: https://chromium-review.googlesource.com/1116416Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Commit-Queue: Matt Falkenhagen <falken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570685}

content/browser/service_worker/service_worker_metrics.cc

@@ -772,14 +772,6 @@ void ServiceWorkerMetrics::RecordTimeToSendStartWorker(
                                     duration);
 }
 
-void ServiceWorkerMetrics::RecordTimeToURLJob(base::TimeDelta duration,
-                                              StartSituation situation) {
-  std::string name = "EmbeddedWorkerInstance.Start.TimeToURLJob";
-  UMA_HISTOGRAM_MEDIUM_TIMES(name, duration);
-  RecordSuffixedMediumTimeHistogram(name, StartSituationToSuffix(situation),
-                                    duration);
-}
-
 void ServiceWorkerMetrics::RecordTimeToStartThread(base::TimeDelta duration,
                                                    StartSituation situation) {
   std::string name = "EmbeddedWorkerInstance.Start.TimeToStartThread";

content/browser/service_worker/service_worker_metrics.h

@@ -383,8 +383,6 @@ class ServiceWorkerMetrics {
   static void RecordProcessCreated(bool is_new_process);
   static void RecordTimeToSendStartWorker(base::TimeDelta duration,
                                           StartSituation start_situation);
-  static void RecordTimeToURLJob(base::TimeDelta duration,
-                                 StartSituation start_situation);
   static void RecordTimeToStartThread(base::TimeDelta duration,
                                       StartSituation start_situation);
   static void RecordTimeToEvaluateScript(base::TimeDelta duration,