Roll src/third_party/skia/ 09f5cd44a..dc27a648d (4 commits).

https://chromium.googlesource.com/skia.git/+log/09f5cd44ae30..dc27a648d2ff

$ git log 09f5cd44a..dc27a648d --date=short --no-merges --format='%ad %ae %s'
2016-06-06 msarett Add SkDefaultXform as a catch-all to handle color conversions
2016-06-06 scroggo Use Options object passed to startScanlineDecode
2016-06-06 scroggo Revert of Make SkPngCodec decode progressively. (patchset #26 id:520001 of https://codereview.chromium.org/1997703003/ )
2016-06-06 msarett Gamma sanity checks

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

Review-Url: https://codereview.chromium.org/2043873002
Cr-Commit-Position: refs/heads/master@{#398127}

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': '09f5cd44ae30f7089cde0131a3d07abf4c47af67',
+  'skia_revision': 'dc27a648d2ff23b2e96232c00c15976c46e1d48d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.