PP_ERROR_USERCANCEL  188 chrome/renderer/pepper/pepper_flash_menu_host.cc     SendMenuReply(PP_ERROR_USERCANCEL, -1);
PP_ERROR_USERCANCEL  124 content/renderer/pepper/pepper_file_chooser_host.cc     reply_context_.params.set_result(PP_ERROR_USERCANCEL);
PP_ERROR_USERCANCEL   67 native_client_sdk/src/libraries/nacl_io/pepper_interface.cc     case PP_ERROR_USERCANCEL: return EPERM;