Roll src/third_party/skia/ 4c42eebc5..3ab14ca95 (3 commits).

https://chromium.googlesource.com/skia.git/+log/4c42eebc5551..3ab14ca950d9

$ git log 4c42eebc5..3ab14ca95 --date=short --no-merges --format='%ad %ae %s'
2016-07-10 robertphillips Fix misplaced guard
2016-07-10 reed Revert of change mapRectScaleTranslate to pass args/ret by value (patchset #1 id:1 of https://codereview.chromium.org/2137853002/ )
2016-07-10 reed change mapRectScaleTranslate to pass args/ret by value

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

Review-Url: https://codereview.chromium.org/2136883002
Cr-Commit-Position: refs/heads/master@{#404593}

DEPS

@@ -36,7 +36,7 @@ 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': '4c42eebc55518019e6c2437e59adba28297221df',
+  'skia_revision': '3ab14ca950d98a5c4d4c4a5f96ea8b0c984e0116',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.