Update ServiceWorker event handled status histogram

content/browser/service_worker/service_worker_metrics.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_
 
 #include "base/macros.h"
 #include "content/browser/service_worker/service_worker_database.h"
 
@@ skipping 55 matching lines @@
   };
 
   enum StopWorkerStatus {
     STOP_STATUS_STOPPING,
     STOP_STATUS_STOPPED,
     STOP_STATUS_STALLED,
     STOP_STATUS_STALLED_THEN_STOPPED,
     NUM_STOP_STATUS_TYPES
   };
 
+  enum EventType {
+    EVENT_TYPE_FETCH,
+    // Add new events to record here.
+
+    NUM_EVENT_TYPES
+  };
+
   // Used for ServiceWorkerDiskCache.
   static void CountInitDiskCacheResult(bool result);
   static void CountReadResponseResult(ReadResponseResult result);
   static void CountWriteResponseResult(WriteResponseResult result);
 
   // Used for ServiceWorkerDatabase.
   static void CountOpenDatabaseResult(ServiceWorkerDatabase::Status status);
   static void CountReadDatabaseResult(ServiceWorkerDatabase::Status status);
   static void CountWriteDatabaseResult(ServiceWorkerDatabase::Status status);
   static void RecordDestroyDatabaseResult(ServiceWorkerDatabase::Status status);
@@ skipping 17 matching lines @@
 
   // Records the result of trying to stop a worker.
   static void RecordStopWorkerStatus(StopWorkerStatus status);
 
   // Records the time taken to successfully stop a worker.
   static void RecordStopWorkerTime(const base::TimeDelta& time);
 
   static void RecordActivateEventStatus(ServiceWorkerStatusCode status);
   static void RecordInstallEventStatus(ServiceWorkerStatusCode status);
 
-  // Records the ratio of unhandled events to the all events fired during
-  // the lifetime of ServiceWorker.
-  static void RecordEventStatus(size_t fired_events, size_t handled_events);
+  // Records how much of dispatched events are handled while a Service
+  // Worker is awake (i.e. after it is woken up until it gets stopped).
+  static void RecordEventHandledRatio(const GURL& scope,
+                                      EventType event,
+                                      size_t handled_events,
+                                      size_t fired_events);
 
   // Records the result of dispatching a fetch event to a service worker.
   static void RecordFetchEventStatus(bool is_main_resource,
                                      ServiceWorkerStatusCode status);
 
   // Records result of a ServiceWorkerURLRequestJob that was forwarded to
   // the service worker.
   static void RecordURLRequestJobResult(bool is_main_resource,
                                         URLRequestJobResult result);
 
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ServiceWorkerMetrics);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_