Roll src/third_party/skia/ e179a9167..323c2ebe9 (2 commits).
Roll src/third_party/skia/ e179a9167..323c2ebe9 (2 commits).

https://chromium.googlesource.com/skia.git/+log/e179a9167f71..323c2ebe9e17

$ git log e179a9167..323c2ebe9 --date=short --no-merges --format='%ad %ae %s'
2016-01-20 joshualitt A few more small changes to make GrAtlasTextBlob nearly self contained
2016-01-20 joshualitt Move distance field text positioning into GrTextUtils

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=benjaminwagner@google.com

Review URL: https://codereview.chromium.org/1611533003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#370421}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk