CommandFirst      878 chrome/browser/ui/tabs/tab_strip_model.cc   DCHECK(command_id > CommandFirst && command_id < CommandLast);
CommandFirst      940 chrome/browser/ui/tabs/tab_strip_model.cc   DCHECK(command_id > CommandFirst && command_id < CommandLast);
CommandFirst      113 chrome/browser/ui/views/tabs/browser_tab_strip_controller.cc         last_command_(TabStripModel::CommandFirst) {