Dzmitry Malyshau 3021defc28 Bug 1602133 - WebGPU presentation r=jgilbert,webidl,smaug,aosmond
This change adds support for CanvasContext presenting WebGPU via CPU readback.
The presentation is handled mostly on GPU process side by managing a list of staging buffers
and copying the contents into a WR external image (backed by an external buffer).

Differential Revision: https://phabricator.services.mozilla.com/D68032

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extra : moz-landing-system : lando
2020-04-06 22:29:18 +00:00
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