Create top level apps component and move some apps code there.

apps/app_restore_service_factory.h

Index: apps/app_restore_service_factory.h
diff --git a/chrome/browser/extensions/app_restore_service_factory.h b/apps/app_restore_service_factory.h
similarity index 96%
rename from chrome/browser/extensions/app_restore_service_factory.h
rename to apps/app_restore_service_factory.h
index 519e23425c618d55791748bced7c905e076a9f0a..cf17ff201a4c4cc42c8ad76d4cc6063c955b6720 100644
--- a/chrome/browser/extensions/app_restore_service_factory.h
+++ b/apps/app_restore_service_factory.h
@@ -10,7 +10,7 @@
 
 class Profile;
 
-namespace extensions {
+namespace apps {
 
 class AppRestoreService;
 
@@ -37,6 +37,6 @@ class AppRestoreServiceFactory : public ProfileKeyedServiceFactory {
   virtual bool ServiceIsCreatedWithProfile() const OVERRIDE;
 };
 
-}  // namespace extensions
+}  // namespace apps
 
 #endif  // CHROME_BROWSER_EXTENSIONS_APP_RESTORE_SERVICE_FACTORY_H_