Remove SK_SUPPORT_LEGACY_DASH_MEASURE
Remove SK_SUPPORT_LEGACY_DASH_MEASURE

Enables more accurate dashing when scaled.

BUG=530095
TBR=caryclark@google.com

Review URL: https://codereview.chromium.org/1612353004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#371158}

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