Try backing SkPicture with SkRecord in Chromium.
Try backing SkPicture with SkRecord in Chromium.

This is our first attempt, mostly to feel this out.  Performance and
correctness problems are both possible.  Please revert this if a benchmark even
smells funny.

That said, we've been working on this a while, are pretty confident it's good
stuff, and have had Skia's internal testing entirely switched over for a week.
Parts of Chromium that serialize and deserialize SkPictures are already
switched over.  This CL finishes things off by switching the default
recorded-from-scratch SkPicture to use SkRecord too.

BUG=

Review URL: https://codereview.chromium.org/504823003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#292157}

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