This patch improves the way that GuestViewManager tracks the destruction of GuestView embedders.

extensions/browser/api/declarative/rules_registry_service.cc

 // Copyright (c) 2012 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 "extensions/browser/api/declarative/rules_registry_service.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 119 matching lines @@
 RulesRegistryService::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 // static
 RulesRegistryService* RulesRegistryService::Get(
     content::BrowserContext* context) {
   return BrowserContextKeyedAPIFactory<RulesRegistryService>::Get(context);
 }
 
+// static
+RulesRegistryService* RulesRegistryService::Get(
+    content::BrowserContext* context,
+    bool create) {
+  return BrowserContextKeyedAPIFactory<RulesRegistryService>::Get(context,
+                                                                  create);
+}
+
 void RulesRegistryService::RegisterRulesRegistry(
     scoped_refptr<RulesRegistry> rule_registry) {
   const std::string event_name(rule_registry->event_name());
   RulesRegistryKey key(event_name, rule_registry->id());
   DCHECK(rule_registries_.find(key) == rule_registries_.end());
   rule_registries_[key] = rule_registry;
 }
 
 scoped_refptr<RulesRegistry> RulesRegistryService::GetRulesRegistry(
     int rules_registry_id,
@@ skipping 61 matching lines @@
 }
 
 void RulesRegistryService::OnExtensionUninstalled(
     content::BrowserContext* browser_context,
     const Extension* extension,
     extensions::UninstallReason reason) {
   NotifyRegistriesHelper(&RulesRegistry::OnExtensionUninstalled, extension);
 }
 
 }  // namespace extensions