Roll src/third_party/skia/ 7d46f4af7..3fb87201a (4 commits).

https://chromium.googlesource.com/skia.git/+log/7d46f4af7dc7..3fb87201a104

$ git log 7d46f4af7..3fb87201a --date=short --no-merges --format='%ad %ae %s'
2016-07-20 reed Revert of have MakeFromImage fission the SkImage into a raster or a texture (patchset #1 id:1 of https://codereview.chromium.org/2167813002/ )
2016-07-20 msarett Refactor parsing and storage of SkGammas
2016-07-20 reed have MakeFromImage fission the SkImage into a raster or a texture
2016-07-20 brianosman Adding an SkColorSpace to SkImage_Gpu

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

Review-Url: https://codereview.chromium.org/2172443003
Cr-Commit-Position: refs/heads/master@{#406711}

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': '7d46f4af7dc759002537a172af121f2bfe200981',
+  'skia_revision': '3fb87201a104c9445fca341756a153f7b147c2a5',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.