Split WarningService from ExtensionSystem.

chrome/browser/extensions/browser_context_keyed_service_factories.cc

Index: chrome/browser/extensions/browser_context_keyed_service_factories.cc
diff --git a/chrome/browser/extensions/browser_context_keyed_service_factories.cc b/chrome/browser/extensions/browser_context_keyed_service_factories.cc
index d071e517277abc19db3929b2e6f0274b162d1869..11e8120d443ba6537e149e0d34d8e6a003cc9833 100644
--- a/chrome/browser/extensions/browser_context_keyed_service_factories.cc
+++ b/chrome/browser/extensions/browser_context_keyed_service_factories.cc
@@ -49,6 +49,7 @@
 #include "chrome/browser/extensions/extension_storage_monitor_factory.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/extension_toolbar_model_factory.h"
+#include "chrome/browser/extensions/extension_warning_badge_service_factory.h"
 #include "chrome/browser/extensions/extension_web_ui_override_registrar.h"
 #include "chrome/browser/extensions/install_tracker_factory.h"
 #include "chrome/browser/extensions/menu_manager_factory.h"
@@ -103,6 +104,7 @@ void EnsureBrowserContextKeyedServiceFactoriesBuilt() {
   extensions::ExtensionStorageMonitorFactory::GetInstance();
   extensions::ExtensionSystemFactory::GetInstance();
   extensions::ExtensionToolbarModelFactory::GetInstance();
+  extensions::ExtensionWarningBadgeServiceFactory::GetInstance();
   extensions::ExtensionWebUIOverrideRegistrar::GetFactoryInstance();
   extensions::FeedbackPrivateAPI::GetFactoryInstance();
   extensions::FontSettingsAPI::GetFactoryInstance();