Add async tracing to SWVersion::AddRequest.

content/browser/service_worker/service_worker_metrics.cc

 // Copyright 2014 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_metrics.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/sparse_histogram.h"
 #include "base/strings/string_util.h"
 #include "content/common/service_worker/service_worker_types.h"
@@ skipping 28 matching lines @@
 
 enum EventHandledRatioType {
   EVENT_HANDLED_NONE,
   EVENT_HANDLED_SOME,
   EVENT_HANDLED_ALL,
   NUM_EVENT_HANDLED_RATIO_TYPE,
 };
 
 }  // namespace
 
+const char* ServiceWorkerMetrics::EventTypeToString(EventType event_type) {
+  switch (event_type) {
+    case EventType::ACTIVATE:
+      return "Activate";
+    case EventType::INSTALL:
+      return "Install";
+    case EventType::FETCH:
+      return "Fetch";
+    case EventType::SYNC:
+      return "Sync";
+    case EventType::NOTIFICATION_CLICK:
+      return "Notification Click";
+    case EventType::PUSH:
+      return "Push";
+    case EventType::GEOFENCING:
+      return "Geofencing";
+    case EventType::SERVICE_PORT_CONNECT:
+      return "Service Port Connect";
+    case EventType::MESSAGE:
+      return "Message";
+    case EventType::NUM_TYPES:
+      break;
+  }
+  NOTREACHED() << "Got unexpected event type: " << static_cast<int>(event_type);
+  return "Unknown";
+}
+
 bool ServiceWorkerMetrics::ShouldExcludeSiteFromHistogram(Site site) {
   return site == ServiceWorkerMetrics::Site::NEW_TAB_PAGE;
 }
 
 bool ServiceWorkerMetrics::ShouldExcludeURLFromHistogram(const GURL& url) {
   return ShouldExcludeSiteFromHistogram(SiteFromURL(url));
 }
 
 void ServiceWorkerMetrics::CountInitDiskCacheResult(bool result) {
   UMA_HISTOGRAM_BOOLEAN("ServiceWorker.DiskCache.InitResult", result);
@@ skipping 217 matching lines @@
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.URLRequestJob.FallbackedRequestMode",
                             mode, FETCH_REQUEST_MODE_LAST + 1);
 }
 
 void ServiceWorkerMetrics::RecordTimeBetweenEvents(
     const base::TimeDelta& time) {
   UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.TimeBetweenEvents", time);
 }
 
 }  // namespace content