Previously we were using fX and fY as the top left of the returned
bounds. We need instead to offset the referenced node's bounds by fX,
fY.
While I was here I updated the attribute parsing to the new form and
changed the type of fHref from SkSVGString to SkSVGIRI.
Change-Id: I4bfb91bca62e47f5dabfbb4aad48cbb301a7ea36
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/354118
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Tyler Denniston <tdenniston@google.com>
3df6c20a05