PPB_TRACE_EVENT_DEV_INTERFACE  158 native_client_sdk/src/libraries/xray/browser.c       PPB_TRACE_EVENT_DEV_INTERFACE);
PPB_TRACE_EVENT_DEV_INTERFACE   19 ppapi/tests/test_trace_event.cc       pp::Module::Get()->GetBrowserInterface(PPB_TRACE_EVENT_DEV_INTERFACE));