Working patch to remove constant attributes.  This may cause some gm mismatches, I will rebaseline tonight.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/84c94c0dfd1e12e97d8a835882dda575f36e41d2

Committed: https://skia.googlesource.com/skia/+/95f5194abce19e8ed875f3495fd16c79a9b931b4

Review URL: https://codereview.chromium.org/678073005
12 files changed