move onDrawGlyphRunList to the right scope

Change-Id: Ia8efc005b818c7dfb5d5ab12ba30c4cabec884c0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/472096
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed