ServiceWorker: Migrate the script cache backend from BlockFile to Simple

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 10 matching lines @@
     NUM_READ_RESPONSE_RESULT_TYPES,
   };
 
   enum WriteResponseResult {
     WRITE_OK,
     WRITE_HEADERS_ERROR,
     WRITE_DATA_ERROR,
     NUM_WRITE_RESPONSE_RESULT_TYPES,
   };
 
+  enum DiskCacheMigrationResult {
+    MIGRATION_OK,
+    MIGRATION_NOT_NECESSARY,
+    MIGRATION_ERROR_FAILED,
+    NUM_MIGRATION_RESULT_TYPES,
+  };
+
   enum DeleteAndStartOverResult {
     DELETE_OK,
     DELETE_DATABASE_ERROR,
     DELETE_DISK_CACHE_ERROR,
     NUM_DELETE_AND_START_OVER_RESULT_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);
 
   // Used for ServiceWorkerStorage.
   static void RecordDeleteAndStartOverResult(DeleteAndStartOverResult result);
+  static void RecordDiskCacheMigrationResult(DiskCacheMigrationResult result);
 
   // Counts the number of page loads controlled by a Service Worker.
   static void CountControlledPageLoad(const GURL& url);
 
   // Records the result of trying to start a worker. |is_installed| indicates
   // whether the version has been installed.
   static void RecordStartWorkerStatus(ServiceWorkerStatusCode status,
                                       bool is_installed);
 
   // Records the time taken to successfully start a worker. |is_installed|
   // indicates whether the version has been installed.
   static void RecordStartWorkerTime(const base::TimeDelta& time,
                                     bool is_installed);
 
   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);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ServiceWorkerMetrics);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_METRICS_H_