Roll src/third_party/skia/ 871a04843..92605b35e (1 commit).
Roll src/third_party/skia/ 871a04843..92605b35e (1 commit).

https://chromium.googlesource.com/skia.git/+log/871a0484305e..92605b35efa0

$ git log 871a04843..92605b35e --date=short --no-merges --format='%ad %ae %s'
2016-05-03 robertphillips Add Gr*Proxy classes

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

Review-Url: https://codereview.chromium.org/1946623002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#391286}

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