// ExtensionRegistryObserver implementation.
virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
// ExtensionRegistryObserver implementation.
virtual void OnExtensionLoaded(content::BrowserContext* browser_context,
virtual void OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,
virtual void OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,