Introduce ServiceWorkerHandle for tracking WebServiceWorkerImpl reference

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/message_loop/message_loop.h"
 #include "base/strings/string_util.h"
 #include "content/browser/service_worker/service_worker_info.h"
@@ skipping 18 matching lines @@
     const base::FilePath& path,
     quota::QuotaManagerProxy* quota_manager_proxy)
     : last_registration_id_(0),  // TODO(kinuko): this should be read from disk.
       last_version_id_(0),       // TODO(kinuko): this should be read from disk.
       quota_manager_proxy_(quota_manager_proxy) {
   if (!path.empty())
     path_ = path.Append(kServiceWorkerDirectory);
 }
 
 ServiceWorkerStorage::~ServiceWorkerStorage() {
-  // TODO(michaeln): fix the onwership model such that workers can get shutdown
-  // prior to browser close time.
-  for (PatternToRegistrationMap::const_iterator iter =
-           registration_by_pattern_.begin();
-       iter != registration_by_pattern_.end();
-       ++iter) {
-    iter->second->Shutdown();
-  }
   registration_by_pattern_.clear();
 }
 
 void ServiceWorkerStorage::FindRegistrationForPattern(
     const GURL& pattern,
     const FindRegistrationCallback& callback) {
   ServiceWorkerStatusCode status = SERVICE_WORKER_ERROR_NOT_FOUND;
   scoped_refptr<ServiceWorkerRegistration> found;
   PatternToRegistrationMap::const_iterator match =
       registration_by_pattern_.find(pattern);
@@ skipping 107 matching lines @@
   // Temporarily borrowed directly from appcache::Namespace::IsMatch().
   // We have to escape '?' characters since MatchPattern also treats those
   // as wildcards which we don't want here, we only do '*'s.
   std::string pattern_spec(pattern.spec());
   if (pattern.has_query())
     ReplaceSubstringsAfterOffset(&pattern_spec, 0, "?", "\\?");
   return MatchPattern(url.spec(), pattern_spec);
 }
 
 }  // namespace content