Roll src/third_party/skia/ 6663acff0..1e42775df (2 commits).
Roll src/third_party/skia/ 6663acff0..1e42775df (2 commits).

https://chromium.googlesource.com/skia.git/+log/6663acff010c..1e42775df95a

$ git log 6663acff0..1e42775df --date=short --no-merges --format='%ad %ae %s'
2016-05-10 bsalomon Remove config range asserts that cause tautological-constant-out-of-range-compare warnings on clang GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1964053002
2016-05-10 robertphillips Fix AllocedProxyTest on Mesa

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

Review-Url: https://codereview.chromium.org/1965893002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#392692}

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