Created attachment 398878 [details]
WIP Patch

Current problematic constructs with the modernizer.

Had some issues with these typedefs

-    typedef T* (PackedAlignedPtr::*UnspecifiedBoolType);
+    using UnspecifiedBoolType = T *(PackedAlignedPtr<T, >::*);

It will totally destroy typedef enum code but we probably shouldn't be using those constructs anyways.

typedef enum {
    LenientConversion,
    StrictConversion,
    StrictConversionReplacingUnpairedSurrogatesWithFFFD,
} ConversionMode;

Did have some issues with removing typedefs in Variant.h

Could do a quick pass first to remove all the "typedef enum" in the tree: Should be a mechanical process.