Use angle::Result in allocation and math check macros. Replace these with ANGLE_CHECK_*_ALLOC and ANGLE_CHECK_*_MATH depending on the specific error type. Bug: angleproject:2491 Change-Id: Ic4395101fe701c563ae2b92aa2c55c93b934a7de Reviewed-on: https://chromium-review.googlesource.com/c/1262737 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Frank Henigman <fjhenigman@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>