Roll src/third_party/skia/ c2e4bb39d..aabe15e20 (3 commits).
Roll src/third_party/skia/ c2e4bb39d..aabe15e20 (3 commits).

https://chromium.googlesource.com/skia.git/+log/c2e4bb39d4ac..aabe15e206bf

$ git log c2e4bb39d..aabe15e20 --date=short --no-merges --format='%ad %ae %s'
2016-05-13 msarett Simple program for visualizing gamuts
2016-05-13 scroggo GMs: fail gracefully for null surface
2016-05-13 liyuqian Use title buttons to switch slides

BUG=skia5282

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

Review-Url: https://codereview.chromium.org/1973353002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#393536}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk