Roll src/third_party/skia/ c7e211acd..a1bfaad00 (13 commits).
Roll src/third_party/skia/ c7e211acd..a1bfaad00 (13 commits).

https://chromium.googlesource.com/skia.git/+log/c7e211acd0c9..a1bfaad00486

$ git log c7e211acd..a1bfaad00 --date=short --no-merges --format='%ad %ae %s'
2016-01-07 mtklein Set up some hooks for premul/swizzzle opts.
2016-01-07 ethannicholas Broke GrTessellatingPathRenderer's tessellator out into a separate file. GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1557083002
2016-01-07 joshualitt Revert of Make a single GrSingleOwner in GrContext (patchset #3 id:40001 of https://codereview.chromium.org/1563703004/ )
2016-01-07 joshualitt Revert of Add guards to GrTextureProvider (patchset #5 id:80001 of https://codereview.chromium.org/1567983002/ )
2016-01-07 msarett Rename SkGifCodec, SkIcoCodec, SkWbmpCodec
2016-01-07 bsalomon Move config texturability/renderability to config table.
2016-01-07 joshualitt Add guards to GrTextureProvider
2016-01-07 bungeman More <type_traits> for SkTLogic.h.
2016-01-07 herb Fix handling of radii scaling to force the result to always be less than a given side. BUG=472147 GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1567723004
2016-01-07 caryclark test & doc for SkUnitCubicInterp
2016-01-07 joshualitt Make a single GrSingleOwner in GrContext
2016-01-07 reed Revert[2] of "add backdrop option to SaveLayerRec"
2016-01-07 msarett Store ninepatch chunks in the png header in CodexTest

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

Review URL: https://codereview.chromium.org/1569873004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#368197}

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