Previously the surface argument of CreateSwapChain was made un-optional
to prevent a compilation error. This broke examples because the
device-compatibility part of the wire would start dereferencing a null
pointer.
Instead of making the surface non-optional, make optional objects not
produce = nullptr for method calls in webgpu_cpp.h.
Bug: dawn:22
Change-Id: Icef357cc2b11ed452c78431dde514e4d497ae159
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/31565
Reviewed-by: Shaobo Yan <shaobo.yan@intel.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
9d6265bc07