[ServiceWorkerCache] Implement storage::QuotaClient

content/browser/service_worker/service_worker_cache.proto

 // 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package content;
 
 message ServiceWorkerCacheStorageIndex {
   message Cache {
     required string name = 1;
     optional int32 DEPRECATED_size = 2;
     optional int64 size = 3;
   }
   repeated Cache cache = 1;
+  optional string origin = 2;
 }
 
 message ServiceWorkerRequestResponseHeaders {
   message HeaderMap {
     required string name = 1;
     required string value = 2;
   }
 
   enum ResponseType {
     BASIC_TYPE = 0;
     CORS_TYPE = 1;
     DEFAULT_TYPE = 2;
     ERROR_TYPE = 3;
     OPAQUE_TYPE = 4;
   }
 
   required string method = 1;
   required int32 status_code = 2;
   required string status_text = 3;
   repeated HeaderMap request_headers = 4;
   repeated HeaderMap response_headers = 5;
   required ResponseType response_type = 6;
 }