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On Windows, create a VsyncProviderWin in SkiaOutputDeviceDawn. Then
following each swap buffers, use the current timestamp snapped to the
next vsync interval as the presentation time.

Bug: 1021566
Change-Id: Id7e1fb3ec4c4d63517e556be6e36a824356e7e7d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2154596Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: Sean Gilhuly <sgilhuly@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760569}