message: Fix a bug for depth test on Vulkan backend
  The default value for maxDepthBound should be 1.0.
diff: @@ -74,12 +74,16 @@ namespace dawn_native { namespace vulkan {
  mCreateInfo.flags = 0;
  const auto& depth = GetDepth();
  - mCreateInfo.depthTestEnable = VK_TRUE;
  + // Depth writes only occur if depth is enabled
  + mCreateInfo.depthTestEnable =
  + (depth.compareFunction == dawn::CompareFunction::Always && !depth.depthWriteEnabled)
  + ? VK_FALSE
  + : VK_TRUE;
  mCreateInfo.depthWriteEnable = depth.depthWriteEnabled ? VK_TRUE : VK_FALSE;
  mCreateInfo.depthCompareOp = VulkanCompareOp(depth.compareFunction);
  mCreateInfo.depthBoundsTestEnable = false;
  mCreateInfo.minDepthBounds = 0.0f;
  - mCreateInfo.maxDepthBounds = 0.0f;
  + mCreateInfo.maxDepthBounds = 1.0f;
  const auto& stencil = GetStencil();
  mCreateInfo.stencilTestEnable = StencilTestEnabled() ? VK_TRUE : VK_FALSE;
  