Roll src/third_party/skia/ 4583ec51d..88e8aef39 (2 commits).

https://chromium.googlesource.com/skia.git/+log/4583ec51d9dd..88e8aef39164

$ git log 4583ec51d..88e8aef39 --date=short --no-merges --format='%ad %ae %s'
2016-06-27 egdaniel Fix Vulkan readPixels
2016-06-27 csmartdalton Check PremulType during GrGradientEffect::onIsEqual

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

Review-Url: https://codereview.chromium.org/2108483002
Cr-Commit-Position: refs/heads/master@{#402359}
1 file changed