Possible out of scope for this review, but I'm a bit confused about when an app should specify "true" for this field. Is this a promise about what the properties of the sampler that the shader might use to read from the texture?

(Otherwise the actual change itself looks good to me.)

@damyanp this is a promise that the shader sees this texture as an MSAA texture, and we are only able to create bind groups that have a multisampled texture filling this binding.

@kvark - ah, I think I'm catching up. Presumably this would be validated (in all implementations) so that if you try and bind a multisampled texture to a binding where the layout doesn't have this set then it would fail?

Yes, it should be validated along all the other fields of the bind group layout (by all implementations).

Rebased over #365

Merging this as it is quite trivial.