GitLab

This CL creates a SharedImageRepresentationGLTexture for Ozone-based
SharedImages. The representation creates a GLImage from the pixmap
via GLImageNativePixmap::Initialize and then binds it to a GL texture.

Like in the case of the Pixmap Dawn representation, synchronization
will be added in a future CL.

Also, updates SharedImageBackingOzone to properly track the cleared
rect now that it is being used on SIRGLTexture::BeginAccess as per
chromium-review.googlesource.com/1990195.

Bug: 1023997,996470
Change-Id: Icacf20bc0f754fbc8acb37693618f2aca64568e8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913085
Commit-Queue: Brian Ho <hob@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Reviewed-by: Daniele Castagna <dcastagna@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738665}