It seems that some people can run into an issue with building CEF/CEFSharp from source to competition. There are several guides but they can vary and the requirements are not always in agreement. To try and simplify the process I went ahead and put together some build scripts and dockerfiles to automate building. It can build just CEF or CEF and CEFSharp from start to finish just requiring docker. The powershell scripts could be used outside of docker as well for environment management.
It is easy to have them only build CEF as well. Using a 32 core Azure machine start to finish from a new provision is about 2.1 hours.
Hopefully these should make it easier for others to build on Windows, tweaking build flags or applying patches.
https://github.com/mitchcapper/CefSharpDockerfiles
Right now they are configured to only build release builds, but doing debug builds would be a fairly easy tweak.