Roll external/skia 722efde79..ee783966d (5 commits)
https://skia.googlesource.com/skia.git/+log/722efde79..ee783966d
2018-08-01 bsalomon@google.com templatize GrSurfaceProxyRef
2018-08-01 brucewang@google.com Generate Emoji rendering test using typeface created by different font files.
2018-08-01 skcms-skia-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com Roll skia/third_party/skcms dc97dc542b6d..95d1987a561d (1 commits)
2018-08-01 fmalita@chromium.org Fix !defined(SK_XML) builds
2018-08-01 timliang@google.com implemented copy surface as draw then blit for metal gpu backend
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Change-Id: I7e39e189b32b1d12c02ac791f0452840b23738a9
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