Roll src/third_party/skia/ 78e0aef61..64673afe1 (3 commits).
Roll src/third_party/skia/ 78e0aef61..64673afe1 (3 commits).

https://chromium.googlesource.com/skia.git/+log/78e0aef610d7..64673afe1a25

$ git log 78e0aef61..64673afe1 --date=short --no-merges --format='%ad %ae %s'
2015-12-16 joshualitt Add VisualBench switch to extra_config
2015-12-16 caryclark only call scalar finite when necessary
2015-12-16 bsalomon Generate a table of config->glformat info. Precursor to lifting this to caps. GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1527383003

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

Review URL: https://codereview.chromium.org/1531883002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#365636}

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