Same as Chrome's args, this allows us to set the
DeviceDescriptor::forceEnabledToggles and forceDisabledToggles when
creating the GPUDevice.
Example: node cmdline.ts ... --gpu-provider-flag=enable-dawn-features=dump_shaders ...
Bug: dawn:1163
Change-Id: Ib5db71355f72e5d08f8fe87313c5e3d63ee236c3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/66963
Commit-Queue: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>