Roll src/third_party/skia/ c30833327..b399e3851 (18 commits).

https://skia.googlesource.com/skia.git/+log/c30833327f0d..b399e38518c7

$ git log c30833327..b399e3851 --date=short --no-merges --format='%ad %ae %s'
2016-12-12 msarett Add Gray test color images to bots
2016-12-12 stani Add a method in SkCanvas to set "hard" clip bounds.
2016-12-12 msarett Decode to sRGB on Android
2016-12-12 liyuqian Add GMs and benchs for concave Analytic AA
2016-12-12 fmalita Use unsigned arithmetic for SkBitmapProcStateAutoMapper bias
2016-12-12 reed Hide exotic clipops, with a private rename for internal use
2016-12-12 halcanary SkBitmap::setPixelRef():  less reference churn
2016-12-12 borenet gen_tasks.go: Assert that all compile tasks are in the JOBS list
2016-12-12 caryclark fix fuzz
2016-12-12 mtklein Just make Android.bp bpfmt compliant to begin with.
2016-12-09 scroggo Fix SkGifCodec bugs around truncated data
2016-12-12 egdaniel Revert "added sk_FragCoord support to skslc"
2016-12-08 raftias Updated the get_images_from_skps tool to check for ICC profile support
2016-12-12 borenet Disable flaky GSStoreTest
2016-12-09 ethannicholas added sk_FragCoord support to skslc
2016-12-12 mtklein Remove dependency on NDK cpufeatures.
2016-12-11 mtklein funnel f16 through standard load/store/gather
2016-12-12 reed change SkClipOp to a class enum

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, see:
http://www.chromium.org/developers/tree-sheriffs/sheriff-details-chromium#TOC-Failures-due-to-DEPS-rolls

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
TBR=msarett@google.com

Review-Url: https://codereview.chromium.org/2567283002
Cr-Commit-Position: refs/heads/master@{#438030}

DEPS

@@ -40,7 +40,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling Skia
   # and whatever else without interference from each other.
-  'skia_revision': 'c30833327f0dda75a8fbe061f3f1966d1f6621a3',
+  'skia_revision': 'b399e38518c7c28e94579ce382e64fdf0697a7e9',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.