Adds --enable-app-launcher command line switch

chrome/browser/dom_ui/app_launcher_handler.cc

Index: chrome/browser/dom_ui/app_launcher_handler.cc
diff --git a/chrome/browser/dom_ui/app_launcher_handler.cc b/chrome/browser/dom_ui/app_launcher_handler.cc
index 3f3d04a70853188df29b85eadd3fef34a327a1fd..2da2ef67fc0f0ce85f2a6d94d7f3fe2690716529 100644
--- a/chrome/browser/dom_ui/app_launcher_handler.cc
+++ b/chrome/browser/dom_ui/app_launcher_handler.cc
@@ -153,6 +153,10 @@ void AppLauncherHandler::FillAppDictionary(DictionaryValue* dictionary) {
   } else {
     dictionary->SetBoolean("showPromo", false);
   }
+
+  bool showLauncher =
+      CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableAppLauncher);
+  dictionary->SetBoolean("showLauncher", showLauncher);
 }
 
 void AppLauncherHandler::HandleGetApps(const ListValue* args) {