This bot: https://build.chromium.org/p/chromium.gpu.fyi/builders/GPU%20Win%20Clang%20Builder%20%28dbg%29

Started failing the confirm build no-op step at this build https://build.chromium.org/p/chromium.gpu.fyi/builders/GPU%20Win%20Clang%20Builder%20%28dbg%29/builds/13423 with the following error message:

ninja explain: output obj/headless/headless_renderer.lib doesn't exist
ninja explain: obj/headless/headless_renderer.lib is dirty

https://chromium.googlesource.com/chromium/src/+/8303a91150b12ffda29e1d2d5e46dc1371730bfe is in the regression range and seems very related because it adds headless on Windows. dvallet@ can you take a look?