Roll src/third_party/skia/ ffc2aea3c..6536ae590 (3 commits).
Roll src/third_party/skia/ ffc2aea3c..6536ae590 (3 commits).

https://chromium.googlesource.com/skia.git/+log/ffc2aea3cb69..6536ae590e38

$ git log ffc2aea3c..6536ae590 --date=short --no-merges --format='%ad %ae %s'
2016-05-02 ethannicholas added GrMSAAPathRenderer GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1834133003
2016-05-02 bungeman Clean up SkFontConfigInterface implementation.
2016-05-02 mtklein Add a hook for CPU-optimized sRGB-sRGB srcover.

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

Review-Url: https://codereview.chromium.org/1939953002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#391045}

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