Update installed ServiceWorkers.

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 <string>
 
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
@@ skipping 374 matching lines @@
   DCHECK_NE(kInvalidServiceWorkerResponseId, id);
   database_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(base::IgnoreResult(
           &ServiceWorkerDatabase::PurgeUncommittedResourceIds),
           base::Unretained(database_.get()),
           std::set<int64>(&id, &id + 1)));
   StartPurgingResources(std::vector<int64>(1, id));
 }
 
+void ServiceWorkerStorage::CompareScriptResources(
+    int64 lhs_id, int64 rhs_id,
+    const CompareCallback& callback) {
+  // TODO: claim equality for the moment
+  RunSoon(FROM_HERE, base::Bind(callback, SERVICE_WORKER_OK, 0));
+}
+
 void ServiceWorkerStorage::DeleteAndStartOver(const StatusCallback& callback) {
   Disable();
 
   // Delete the database on the database thread.
   PostTaskAndReplyWithResult(
       database_task_runner_,
       FROM_HERE,
       base::Bind(&ServiceWorkerDatabase::DestroyDatabase,
                  base::Unretained(database_.get())),
       base::Bind(&ServiceWorkerStorage::DidDeleteDatabase,
@@ skipping 791 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