Roll src/third_party/skia 498d7ac:a8bd38e

Roll src/third_party/skia 498d7ac:a8bd38e

Summary of changes available at:
https://chromium.googlesource.com/skia/+log/498d7ac..a8bd38e

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

Commits in this roll:
a8bd38e senorblanco@chromium.org Add cropped-then-expanded test cases to blur_image_filter tests.
ef784fb caryclark@google.com More conic-specific tests revealed a few conic-specific bugs. Because javascript / canvas make visualizing conics tricky, new native tools are required.

Committed: https://crrev.com/53bdfa8690fe3d7bba55fa959dc36f212e6379da
Cr-Commit-Position: refs/heads/master@{#357200}

[skia-deps-roller, 2015-10-30 20:31:12]

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

[skia-deps-roller, 2015-10-30 20:31:15]

This roll was created by the Blink AutoRollBot.
    http://www.chromium.org/blink/blinkrollbot

[commit-bot: I haz the power, 2015-10-30 20:33:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1406113006/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1406113006/1

[commit-bot: I haz the power, 2015-10-30 22:11:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-30 22:13:24]

Patchset 1 (id:??) landed as
https://crrev.com/53bdfa8690fe3d7bba55fa959dc36f212e6379da
Cr-Commit-Position: refs/heads/master@{#357200}