is_valid_id 1311 content/browser/renderer_host/render_process_host_impl.cc if (!TransportDIB::is_valid_id(dib_id)) is_valid_id 135 ui/surface/transport_dib.h static bool is_valid_id(Id id); is_valid_id 105 ui/surface/transport_dib_gtk.cc if (!is_valid_id(key_))