The dawn-native feature enables additional functionality that is supported only when the WebGPU implementation is dawn_native.
Additional functionality:
wgpu::DawnTogglesDeviceDescriptor may be chained on wgpu::DeviceDescriptor on device creation to enable Dawn-specific toggles on the device.
wgpu::DawnCacheDeviceDescriptor may be chained on wgpu::DeviceDescriptor on device creation to enable cache options such as isolation keys.
Synchronous adapter.CreateDevice(const wgpu::DeviceDescriptor*) may be called.
Notes:
wgpu::DeviceDescriptor does nothing, but its presence in the Adapter's set of supported features means that the additional functionality is supported.