Require explicit selection of traits for LazyInstance

chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.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 "chrome/browser/extensions/api/sync_file_system/extension_sync_event_observer.h"
 
 #include <utility>
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h"
 #include "chrome/browser/sync_file_system/sync_event_observer.h"
 #include "chrome/browser/sync_file_system/sync_file_system_service.h"
 #include "chrome/browser/sync_file_system/sync_file_system_service_factory.h"
 #include "chrome/browser/sync_file_system/syncable_file_system_util.h"
 #include "chrome/common/extensions/api/sync_file_system.h"
 #include "content/public/browser/browser_context.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
 #include "extensions/common/extension_set.h"
 #include "storage/browser/fileapi/file_system_url.h"
 #include "storage/common/fileapi/file_system_util.h"
 
 using sync_file_system::SyncEventObserver;
 
 namespace extensions {
 
 static base::LazyInstance<
-    BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver> > g_factory =
-    LAZY_INSTANCE_INITIALIZER;
+    BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver>>::DestructorAtExit
+    g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 BrowserContextKeyedAPIFactory<ExtensionSyncEventObserver>*
 ExtensionSyncEventObserver::GetFactoryInstance() {
   return g_factory.Pointer();
 }
 
 ExtensionSyncEventObserver::ExtensionSyncEventObserver(
     content::BrowserContext* context)
     : browser_context_(context), sync_service_(NULL) {}
@@ skipping 104 matching lines @@
 }
 
 template <>
 void BrowserContextKeyedAPIFactory<
     ExtensionSyncEventObserver>::DeclareFactoryDependencies() {
   DependsOn(sync_file_system::SyncFileSystemServiceFactory::GetInstance());
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
 }
 
 }  // namespace extensions