Roll external/skia e2d4e8f27..09068256d (28 commits)

https://skia.googlesource.com/skia.git/+log/e2d4e8f27..09068256d

2018-01-03 brianosman@google.com Remove unused color from all distance field GPs and GrAtlasTextOp
2018-01-03 reed@google.com partial revert of https://skia-review.googlesource.com/c/skia/+/90026 for android
2018-01-03 reed@google.com update pipe for lattice and shadowrec
2018-01-03 caryclark@skia.org refresh public includes
2018-01-03 caryclark@skia.org support srgb flag in bookmaker
2018-01-03 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ d8724a947..93b059db4 (1 commit)
2018-01-03 rmistry@google.com Add Housekeeper-PerCommit-Bookmaker to cq.cfg with 100% experiment%
2018-01-03 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ 910a3dafd..d8724a947 (1 commit)
2018-01-03 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ c8c9a24a1..910a3dafd (1 commit)
2018-01-03 reed@google.com remove unused declarations
2018-01-02 fmalita@chromium.org [skotty] Fix native path lerp
2018-01-02 reed@google.com fix skipT to use sizeof T
2018-01-02 fmalita@chromium.org [skotty] Native SkPath interpolation
2018-01-02 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ c33f1e8c3..c8c9a24a1 (1 commit)
2018-01-02 fmalita@chromium.org [skotty] Clip/scale/center animations in Viewer
2018-01-02 bsalomon@google.com Avoid initializing SkStrokeRect twice in GrStyle copy constructor.
2018-01-02 liyuqian@google.com Document the 2pt conical gradient
2018-01-02 liyuqian@google.com Do `gclient sync` before compile
2018-01-02 reed@google.com use tool_utils to encapsulate checking for recording canvas and makeSurface
2018-01-02 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ d078c6812..c33f1e8c3 (1 commit)
2018-01-02 rmistry@google.com Housekeeper-PerCommit-Bookmaker bot to verify that docs match includes
2018-01-02 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ ffa2cd04b..d078c6812 (1 commit)
2018-01-02 liyuqian@google.com Changes to make 2pt gradient source code better aligned with our future doc
2018-01-02 angle-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/externals/angle2/ 8c3988c59..ffa2cd04b (6 commits)
2018-01-02 borenet@google.com Skip AUTHORS check for Skia service accounts
2018-01-02 fmalita@chromium.org [skotty] Improved shape & layer paint order
2018-01-02 reed@google.com simplify/cleanup readbuffer impl
2018-01-02 caryclark@skia.org update image doc and minor bookmaker fixes

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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
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Test: Presubmit checks will test this change.
Change-Id: Ia30280eee18f221c90fb35d938afc07cb06aa33f
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