Roll src/third_party/skia/ a2e056773..3e2f5624b (6 commits).
Roll src/third_party/skia/ a2e056773..3e2f5624b (6 commits).

https://chromium.googlesource.com/skia.git/+log/a2e056773da8..3e2f5624b4d0

$ git log a2e056773..3e2f5624b --date=short --no-merges --format='%ad %ae %s'
2015-12-09 fmalita Cap filtering to kMedium_SkFilterQuality when downsampling
2015-12-09 robertphillips Revert of Boost GrGLConicEffect's variables to all high precision (patchset #1 id:1 of https://codereview.chromium.org/1513483002/ )
2015-12-09 borenet Revert of Make NVPR a GL context option instead of a GL context (patchset #9 id:160001 of https://codereview.chromium.org/1448883002/ )
2015-12-09 joshualitt A small text cleanup
2015-12-09 robertphillips Boost GrGLConicEffect's variables to all high precision
2015-12-09 bsalomon Attempt to land cache purge again [and regen bot logs if still failing]

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
TBR=reed@google.com
NOTRY=True
speculating that the text_05000_pixels_per_second failure is unrelated. will watch tree.

Review URL: https://codereview.chromium.org/1510223002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#364108}

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