Open the launcher when hotword is triggered in always-on mode.

chrome/browser/ui/webui/app_list/start_page_handler.cc

Index: chrome/browser/ui/webui/app_list/start_page_handler.cc
diff --git a/chrome/browser/ui/webui/app_list/start_page_handler.cc b/chrome/browser/ui/webui/app_list/start_page_handler.cc
index 25fd15972adcefcfe6017ce2b8ed401d9c66da21..ee155071addd9299305991694e193250f32a615f 100644
--- a/chrome/browser/ui/webui/app_list/start_page_handler.cc
+++ b/chrome/browser/ui/webui/app_list/start_page_handler.cc
@@ -160,6 +160,8 @@ void StartPageHandler::HandleInitialize(const base::ListValue* args) {
   if (!service)
     return;
 
+  service->WebUILoaded();
+
   recommended_apps_ = service->recommended_apps();
   recommended_apps_->AddObserver(this);