tree f14c25e717346331f214c27c8a9f4ac40d2a346e
parent f5b855c2ee909f8b3dce039f66dc9450caee2d7e
author Tom Sepez <tsepez@chromium.org> 1557949527 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1557949527 +0000

Make CFX_XMLNode inherit from TreeNode<>.

Simplify things by making GetNthChild() interpret its index argument
in the same manner as existing code.

Two small behaviour changes reflected in the tests:
- TreeNodes can't be tied into knots by duplicate insertions
- TreeNodes don't tolerate removing a child from the wrong parent.

Change-Id: Ia80844b593e3ad03ebb0cd466c0b4cdf741cf192
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/54371
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>