Roll src/third_party/skia/ 8e8eda9d4..93c69fff5 (4 commits).
Roll src/third_party/skia/ 8e8eda9d4..93c69fff5 (4 commits).

https://chromium.googlesource.com/skia.git/+log/8e8eda9d4d2e..93c69fff5350

$ git log 8e8eda9d4..93c69fff5 --date=short --no-merges --format='%ad %ae %s'
2015-11-23 scroggo Revert of Add SkPngChunkReader. (patchset #9 id:160001 of https://codereview.chromium.org/1040453002/ )
2015-11-23 msarett Revert of Switch Skia's libjpeg-turbo to 1.4.2 (patchset #2 id:160001 of https://codereview.chromium.org/1469553002/ )
2015-11-23 scroggo Add SkPngChunkReader.
2015-11-23 bsalomon Review URL: https://codereview.chromium.org/1464593004

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

Review URL: https://codereview.chromium.org/1471803002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#361137}

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