Roll src/third_party/skia/ 39f053817..ff2103200 (3 commits).

Roll src/third_party/skia/ 39f053817..ff2103200 (3 commits).

https://chromium.googlesource.com/skia.git/+log/39f0538178bc..ff2103200bad

$ git log 39f053817..ff2103200 --date=short --no-merges --format='%ad %ae %s'
2015-11-24 ethannicholas New API for computing optimization invariants.
2015-11-24 reed optimize the disable-caching case for SkImage::readPixels
2015-11-24 borenet Whitespace change to trigger bots after gsutil change

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

Committed: https://crrev.com/a25ce1578b6fd949b4475b8227f130c79fa37816
Cr-Commit-Position: refs/heads/master@{#361451}

[skia-deps-roller, 2015-11-24 20:24:32]

The CQ bit was checked by skia-deps-roller@chromium.org

[commit-bot: I haz the power, 2015-11-24 20:26:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1477523002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1477523002/1

[commit-bot: I haz the power, 2015-11-24 21:41:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-24 21:42:39]

Patchset 1 (id:??) landed as
https://crrev.com/a25ce1578b6fd949b4475b8227f130c79fa37816
Cr-Commit-Position: refs/heads/master@{#361451}