We should not be declaring forward declarations for nsString classes directly,
instead we should use nsStringFwd.h. This will make changing the underlying
types easier.
Enable nsAttrValue::EnumTable to be initialized with enum. So, we could get rid
of the castings in EnumTable. Fix EnumTable initialization comment.
For those untyped enumerations, declare them with uint8_t, as to other typed
enumerations with type size larger than int16_t, force casting to int16_t.
Use {nullptr,0} instead of {0} to represent the last entry.
MozReview-Commit-ID: 7Dma3Apkmxj
This is essentially a better fix for bug 894137. Relying on the aNullParent
argument to UnbindFromTree doesn't actually tell us if the dir=auto node
is still in the tree or not. Instead, we can check the parent of the said
node and only reset the direction if the parent exists, which means that
the node is still in the tree.
