Roll src/third_party/skia/ 6bce4177c..62d3b1011 (13 commits).
Roll src/third_party/skia/ 6bce4177c..62d3b1011 (13 commits).

https://chromium.googlesource.com/skia.git/+log/6bce4177cb72..62d3b1011066

$ git log 6bce4177c..62d3b1011 --date=short --no-merges --format='%ad %ae %s'
2015-12-10 msarett Revert of DM: fix `--config $VIA-pdf` to not crash (patchset #3 id:40001 of https://codereview.chromium.org/1513323002/ )
2015-12-10 msarett Remove flag needed by outdated libpng
2015-12-10 mtklein yet another memcpy -> sk_careful_memcpy
2015-12-10 cdalton Add a warmup flag to visualbench
2015-12-10 herb Fix UB function problems for AA merger.
2015-12-10 aam Fix 'debugging on Android' android_gdb_app script.
2015-12-10 herb Change SkTaskGroup to use std::function. Ripple all the changes.
2015-12-10 scroggo Use size_t for strlen() return value
2015-12-10 reed try adding flag to allow lcd text even in a layer
2015-12-10 scroggo Use DEF_GM everywhere
2015-12-10 robertphillips Address precision issue in circle blur effect
2015-12-10 joshualitt Create GrTextUtils
2015-12-10 msarett Add reallyHasAlpha() to SkAndroidCodec

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

Review URL: https://codereview.chromium.org/1517723003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#364562}

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