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

chrome/browser/ui/app_list/start_page_service.h

Index: chrome/browser/ui/app_list/start_page_service.h
diff --git a/chrome/browser/ui/app_list/start_page_service.h b/chrome/browser/ui/app_list/start_page_service.h
index 33db7b2e32c43f8808b3f414c45eeec6c87e1e09..4a2abb9ecc2f5b0f2183fbe39323827a4de7693c 100644
--- a/chrome/browser/ui/app_list/start_page_service.h
+++ b/chrome/browser/ui/app_list/start_page_service.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
@@ -43,6 +44,9 @@ class StartPageService : public KeyedService {
   void AppListHidden();
   void ToggleSpeechRecognition();
 
+  // Called when the WebUI has finished loading.
+  void WebUILoaded();
+
   // Returns true if the hotword is enabled in the app-launcher.
   bool HotwordEnabled();
 
@@ -89,6 +93,9 @@ class StartPageService : public KeyedService {
   bool speech_button_toggled_manually_;
   bool speech_result_obtained_;
 
+  bool webui_finished_loading_;
+  std::vector<base::Closure> pending_webui_callbacks_;
+
   DISALLOW_COPY_AND_ASSIGN(StartPageService);
 };