Compatibility Mode, the easy part.

[SenorBlanco]

Enable WebGPU Compatibility Mode for all samples that can run unmodified in that mode.

[toji]

Change looks fine, but I wanted to confirm the expected behavior:

• For devices that only support compat mode this change will enable the sample to work where it didn't before.
• For devices that support core WebGPU this flag will effectively be a no-op, even if the browser supports compat mode.
• For browsers that do not implement compat mode this flag will be ignored.

Correct? If so, LGTM!

[kainino0x]

• For devices that support core WebGPU this flag will effectively be a no-op, even if the browser supports compat mode.

The sample will start getting using a compat (but d3d12/vulkan/metal) device in this case, but since the samples don't use any compat features it doesn't have an effect except for a little extra runtime validation

[toji]

Thanks for the clarification, Kai! LGTM, I just wanted to ensure this wasn't going to inadvertently downgrade the adapters for these samples.

[kainino0x]

We realized this will break in Chrome <133 with --enable-unsafe-webgpu, and while that's not really a recommended configuration (people should be doing testing on Canary), it's going to be a bit before 133 stable rolls out, so reverting for now.