This manual intervention is needed because Vulkan 1.2 headers are required to build the new Vulkan validation layers. The updated Vulkan headers repository needs //build_overrides/vulkan_headers.gni now. In addition, //build/config/ui.gni is imported in //build_overrides/vulkan_validation_layers.gni for the definition of use_x11.
This manual intervention is needed because Vulkan 1.2 headers are required to build the new Vulkan validation layers. The updated Vulkan headers repository needs //build_overrides/vulkan_headers.gni now. In addition, //build/config/ui.gni is imported in //build_overrides/vulkan_validation_layers.gni for the definition of use_x11.