- ContextMtl: triangle fan draws should call setupDraw() with original
parameters. Not the modified parameters.
- SurfaceMtl: should initialize metal layer's drawableSize after layer's
creation.
- TextureMtl & FrameBufferMtl: Fix texture copySubImage CPU path
incorrectly copied unflipped area.
- mtl_render_utils: Fix wrong variable name used for trifan compute
pipeline cache table.
- mtl_resources: Fix texture & buffer memory leaks due to missing
ANGLE_MTL_AUTORELEASE.
- mtl_utils: Fix viewport flipping error due to arithmetic between
unsigned & signed values.

These bugs were discovered during dEQP tests running.

Bug: angleproject:2634
Change-Id: Ie01380910ab68a2b876718d9dac0b5b4c41b607c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1906608
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>