ServiceWorker: Migrate the script cache backend from BlockFile to Simple

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/user_metrics_action.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
@@ skipping 45 matching lines @@
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.Database.WriteResult",
                             status, ServiceWorkerDatabase::STATUS_ERROR_MAX);
 }
 
 void ServiceWorkerMetrics::RecordDestroyDatabaseResult(
     ServiceWorkerDatabase::Status status) {
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.Database.DestroyDatabaseResult",
                             status, ServiceWorkerDatabase::STATUS_ERROR_MAX);
 }
 
+void ServiceWorkerMetrics::RecordDiskCacheMigrationResult(
+    DiskCacheMigrationResult result) {
+  UMA_HISTOGRAM_ENUMERATION("ServiceWorker.Storage.DiskCacheMigrationResult",
+                            result, NUM_MIGRATION_RESULT_TYPES);
+}
+
 void ServiceWorkerMetrics::RecordDeleteAndStartOverResult(
     DeleteAndStartOverResult result) {
   UMA_HISTOGRAM_ENUMERATION("ServiceWorker.Storage.DeleteAndStartOverResult",
                             result, NUM_DELETE_AND_START_OVER_RESULT_TYPES);
 }
 
 void ServiceWorkerMetrics::CountControlledPageLoad(const GURL& url) {
   RecordAction(base::UserMetricsAction("ServiceWorker.ControlledPageLoad"));
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(&RecordURLMetricOnUI, url));
@@ skipping 34 matching lines @@
 void ServiceWorkerMetrics::RecordEventStatus(size_t fired_events,
                                              size_t handled_events) {
   if (!fired_events)
     return;
   int unhandled_ratio = (fired_events - handled_events) * 100 / fired_events;
   UMA_HISTOGRAM_PERCENTAGE("ServiceWorker.UnhandledEventRatio",
                            unhandled_ratio);
 }
 
 }  // namespace content