Trace restrict: add train ownership conditional.

Infra sharing whitespace fix.

src/toolbar_gui.h

@@ -12,10 +12,15 @@
 #ifndef TOOLBAR_GUI_H
 #define TOOLBAR_GUI_H
 
+#include "company_type.h"
+#include "widgets/dropdown_type.h"
+
 void AllocateToolbar();
 void ToggleBoundingBoxes();
 void ToggleDirtyBlocks();
 
+DropDownListItem *MakeCompanyDropDownListItem(CompanyID cid);
+
 extern uint _toolbar_width;
 
 #endif /* TOOLBAR_GUI_H */