Roll src/third_party/skia/ 99ad16488..138ea97c1 (5 commits).

https://skia.googlesource.com/skia.git/+log/99ad164886ba..138ea97c1aca

$ git log 99ad16488..138ea97c1 --date=short --no-merges --format='%ad %ae %s'
2016-12-16 brianosman Add color space to picture image as a creation parameter
2016-12-16 robertphillips Add GM for filtering bug
2016-12-16 reed hide deprecated SkImage::preroll
2016-12-16 bsalomon move src/gpu/batches -> src/gpu/ops
2016-12-16 bsalomon Rename GrTestBatch and subclasses to Op

BUG=673261

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/2581253002
Cr-Commit-Position: refs/heads/master@{#439172}

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': '99ad164886ba39f688ebabecd5fe20dd5d923ba0',
+  'skia_revision': '138ea97c1acaed4b968540220724dd5bf671e8db',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.