Reland "Get EGLimage functions out of GrGLInterface."

This reverts commit 753836fcad1a0b91267f04b64c181c8a388f663d.

Reason for revert: fixed

Original change's description:
> Revert "Get EGLimage functions out of GrGLInterface."
>
> This reverts commit bc233135e4b1da0fd628b5822954a23bf3a1c937.
>
> Reason for revert:
> EGLImageTest and TextureBindingTest broken on Windows ANGLE
> Build failures on Debian9, unable to link
>   ld.lld: error: undefined symbol: eglCreateImageKHR
>
> Original change's description:
> > Get EGLimage functions out of GrGLInterface.
> >
> > Only used in test code which can just directly call these.
> >
> > Also removed related code in interface assemble/validate generator.
> >
> > Change-Id: I7e821ebb9328bdd2a54d8ab3af929399ca0517d5
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213480
> > Commit-Queue: Robert Phillips <robertphillips@google.com>
> > Reviewed-by: Robert Phillips <robertphillips@google.com>
>
> TBR=bsalomon@google.com,robertphillips@google.com
>
> Change-Id: I622fadf22c5d79f5b1d335a8a81455978d49a86a
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/213960
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>

TBR=bsalomon@google.com,robertphillips@google.com,michaelludwig@google.com

EXTRA_TRYBOTS=Test-Win10-Clang-AlphaR2-GPU-RadeonR9M470X-x86_64-Debug-All-ANGLE

Change-Id: I71397072fa79ae3c72f3835c5e991b9ef2465a9a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214040
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
8 files changed