Roll src/third_party/skia/ 54e630821..3ab9f2ede (4 commits).

https://chromium.googlesource.com/skia.git/+log/54e63082191f..3ab9f2ede415

$ git log 54e630821..3ab9f2ede --date=short --no-merges --format='%ad %ae %s'
2016-01-06 scroggo Fix some SkCodecPrintfs
2016-01-06 senorblanco Optimize SkTileImageFilter destination bitmap size.
2016-01-06 joshualitt Add additional assert to GrSingleOwner
2016-01-06 halcanary SkPDF: Change handling of large-numbers in matricies.

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

Review URL: https://codereview.chromium.org/1566783002

Cr-Commit-Position: refs/heads/master@{#367882}

DEPS

@@ -39,7 +39,7 @@ 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': '54e63082191f337084f96083ca90d7c35273d6ff',
+  'skia_revision': '3ab9f2ede415438699594915386961df5215f9d7',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.