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Create new component for Paint Previews (Internal Link: go/fdt-design).
The reasoning for creating this component is outlined in the README.

Adds some basic file IO interfaces for working with Skia data streams.

Design Doc [Internal]: go/fdt-design

Part of landing:
https://chromium-review.googlesource.com/c/chromium/src/+/1786583

Bug: 1005949
Change-Id: I6e09aaa840766806527e5baab2224d2ccfc5945a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1814875Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#698902}