Patch by Alexey Knyazev.
Rename to WEBGL_blend_func_extended per agreement in the working
group, because there are differences compared to the OpenGL ES version
of the extension.
Update some test expectations; they will need to be revised again the
next time the WebGL conformance suite is rolled into Chromium.
The extension will be promoted to community approved, per the working
group's approval, in a separate CL.
Bug: 1473838
Change-Id: Ie9a635b9e9bc69fdf1f4f592b24da682a0645a0a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5214661
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1249629}
618a38c105