Roll src/third_party/skia/ f8bdf5d8e..4e30f2716 (6 commits).
Roll src/third_party/skia/ f8bdf5d8e..4e30f2716 (6 commits).

https://chromium.googlesource.com/skia.git/+log/f8bdf5d8e714..4e30f2716417

$ git log f8bdf5d8e..4e30f2716 --date=short --no-merges --format='%ad %ae %s'
2016-05-05 robertphillips Disable layer hoisting for non-8888 canvases
2016-05-05 jvanverth More refactoring for Viewer
2016-05-05 brianosman Added --deepColor option to SampleApp, triggers creation of a ten-bit/channel buffer. (Only on Windows at the moment). Uses new effect to do the final gamma adjustment
2016-05-05 robertphillips Retract GrRenderTarget a bit within SkGpuDevice
2016-05-05 brianosman Bring back sRGB-write-control as a caps bit.
2016-05-05 halcanary experimental/tools/coreGraphicsPdf2png: remove skia dependency

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

Review-Url: https://codereview.chromium.org/1951423003
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#391922}

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