message: Fix MSVC build error due to sign mismatch.
diff: @@ -338,7 +338,7 @@ namespace dawn_native { namespace d3d12 {
  size_t Device::GetD3D12HeapTypeToIndex(D3D12_HEAP_TYPE heapType) const {
  ASSERT(heapType > 0);
  - ASSERT(heapType <= kNumHeapTypes);
  + ASSERT(static_cast<uint32_t>(heapType) <= kNumHeapTypes);
  return heapType - 1;
  }
  