In file included from class_requires_finalization_mixin.cpp:5:
./class_requires_finalization_mixin.h:30:1: warning: [blink-gc] Class 'NeedsFinalizer' requires finalization.
class NeedsFinalizer
^
./class_requires_finalization_mixin.h:32:7: note: [blink-gc] Base class 'MixinFinalizable' requiring finalization declared here:
    , public MixinFinalizable {
      ^
1 warning generated.
