Brad Werth
5c3ccfe280
This is intended to mostly be a no-op, which prevents mismatch between mHasAlpha and whatever the surface format actually is. It changes method signatures to make clear that callers are not determining whether or not a surface *has* alpha, but rather whether it is allowed or ignored. Currently, only MacIOSurface::SurfaceFormatForPixelFormat() has differing behavior based on this parameter. Differential Revision: https://phabricator.services.mozilla.com/D299572