Add initial VR interactive omnibox.

chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc

Index: chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
diff --git a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
index 64774efbc464a46fd6b244df210bb11cee15bca9..0ac26dad90e4a5692b709a7fa845977fcdbd74af 100644
--- a/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
+++ b/chrome/browser/ui/webui/vr_shell/vr_shell_ui_message_handler.cc
@@ -63,9 +63,11 @@ void VrShellUIMessageHandler::HandleUpdateScene(const base::ListValue* args) {
 
 void VrShellUIMessageHandler::HandleDoAction(const base::ListValue* args) {
   int action;
+  const base::DictionaryValue* arguments = nullptr;
   CHECK(args->GetInteger(0, &action));
+  args->GetDictionary(1, &arguments);
   if (vr_shell_) {
-    vr_shell_->DoUiAction((vr_shell::UiAction) action);
+    vr_shell_->DoUiAction((vr_shell::UiAction) action, arguments);
   }
 }