Roll external/skia f7376330d..a12118320 (8 commits)
https://skia.googlesource.com/skia.git/+log/f7376330d..a12118320
2018-11-19 halcanary@google.com SkPDF: move image serialization over to new immediate mode.
2018-11-19 mtklein@google.com clean up SkBitmapProcState a bit
2018-11-19 recipe-roller@chromium.org Roll recipe dependencies (trivial).
2018-11-19 bsalomon@google.com When outsetting for rect blur fast path use abs of scale factors.
2018-11-19 bsalomon@google.com Add single thread assertions to GrResourceCache functions called by GrGpuResource
2018-11-19 jvanverth@google.com Reland "Remove use of integers for atlas indexing"
2018-11-19 brianosman@google.com Use GrVertexWriter in GrDashOp
2018-11-19 recipe-roller@chromium.org Roll recipe dependencies (trivial).
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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md
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Test: Presubmit checks will test this change.
Change-Id: I6138d7bc655c7b6b555ede711c872172f3fc0ab3
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.