Implement EmbeddedWorkerContextClient.setCachedMetadata/clearCachedMetadata

content/browser/service_worker/service_worker_storage.cc

 // Copyright 2013 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_storage.h"
 
 #include "base/bind_helpers.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/sequenced_task_runner.h"
@@ skipping 625 matching lines @@
   return make_scoped_ptr(
       new ServiceWorkerResponseReader(response_id, disk_cache()));
 }
 
 scoped_ptr<ServiceWorkerResponseWriter>
 ServiceWorkerStorage::CreateResponseWriter(int64 response_id) {
   return make_scoped_ptr(
       new ServiceWorkerResponseWriter(response_id, disk_cache()));
 }
 
+scoped_ptr<ServiceWorkerResponseMetadataWriter>
+ServiceWorkerStorage::CreateResponseMetadataWriter(int64 response_id) {
+  return make_scoped_ptr(
+      new ServiceWorkerResponseMetadataWriter(response_id, disk_cache()));
+}
+
 void ServiceWorkerStorage::StoreUncommittedResponseId(int64 id) {
   DCHECK_NE(kInvalidServiceWorkerResponseId, id);
   DCHECK_EQ(INITIALIZED, state_);
 
   if (!has_checked_for_stale_resources_)
     DeleteStaleResources();
 
   database_task_manager_->GetTaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(base::IgnoreResult(
@@ skipping 1115 matching lines @@
     // Give up the corruption recovery until the browser restarts.
     LOG(ERROR) << "Failed to delete the diskcache.";
     callback.Run(SERVICE_WORKER_ERROR_FAILED);
     return;
   }
   DVLOG(1) << "Deleted ServiceWorkerDiskCache successfully.";
   callback.Run(SERVICE_WORKER_OK);
 }
 
 }  // namespace content