Turn on bilerp support for the atlas in viewer
Turn on bilerp support for the atlas in viewer

Because the viewer's device matrix supports higher dpi, the
GM_slug view asserts because there is no padding to support
bi-lerp glyph drawing. Always turn on bi-lerp atlas padding
in viewer.

Change-Id: I34dc29f5097a28aab272efc59cfc6bcde2400f8e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/558641
Reviewed-by: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Commit-Queue: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia