Make WebAssembly feature detection more robust
Make WebAssembly feature detection more robust

When running Chromium with WebAssembly disabled, the `WebAssembly`
global is still defined, and so a `typeof` check isn't quite enough.
Instead, let's try to allocate a Memory region. This operation will
fail with `RangeError` if WebAssembly is disabled.

See: https://github.com/openbsd/ports/blob/77b70736cf794ac0ff7c420e4321017471799f6d/www/chromium/files/chrome#L57

online-go/online-go.com,online-go/online-go.com,online-go/online-go.com,online-go/online-go.com,online-go/online-go.com