1In file included from traceimpl_dependent_scope.cpp:5: 2./traceimpl_dependent_scope.h:55:3: warning: [blink-gc] Base class 'Base<int>' of derived class 'DerivedMissingTrace<int>' requires tracing. 3 void TraceImpl(VisitorDispatcher visitor) { 4 ^ 51 warning generated. 6