Implement notificationclose event

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 40 matching lines @@
     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::NOTIFICATION_CLOSE:
+      return "Notification Close";
     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;
@@ skipping 156 matching lines @@
                                  time);
       break;
     case EventType::PUSH:
       UMA_HISTOGRAM_MEDIUM_TIMES("ServiceWorker.PushEvent.Time", time);
       break;
 
     // Event duration for fetch is recorded separately.
     case EventType::FETCH:
     // For now event duration for these events is not recorded.
     case EventType::GEOFENCING:
+    // TODO(nsatragno): create UMA metric.

[Peter Beverloo, 2016/01/27 19:03:58]

dito re: UMA

[Nina, 2016/01/28 11:59:01]

Done.

+    case EventType::NOTIFICATION_CLOSE:
     case EventType::SERVICE_PORT_CONNECT:
     case EventType::MESSAGE:
       break;
 
     case EventType::NUM_TYPES:
       NOTREACHED() << "Invalid event type";
       break;
   }
 }
 
@@ skipping 56 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