Change the default implementation of ExtensionFunction::HasPermission to use

extensions/browser/event_router.cc

Index: extensions/browser/event_router.cc
diff --git a/extensions/browser/event_router.cc b/extensions/browser/event_router.cc
index 73846ba18e7ec1dcc1f457f201c516a48c80defa..1feb1ca41a52f95e777997bea320a1d1ee4dabff 100644
--- a/extensions/browser/event_router.cc
+++ b/extensions/browser/event_router.cc
@@ -539,6 +539,8 @@ void EventRouter::DispatchEventToProcess(const std::string& extension_id,
   BrowserContext* listener_context = process->GetBrowserContext();
   ProcessMap* process_map = ProcessMap::Get(listener_context);
 
+  // TODO(kalman): Convert this method to use ProcessMap::GuessContextType.
+
   const Extension* extension =
       ExtensionRegistry::Get(browser_context_)->enabled_extensions().GetByID(
           extension_id);