Where did OP discover that this is based on Chromium? I don't actually think that it is - I'm fairly certain it is not based on Chromium (at least the parts that matter), it's a separate, extremely cut-down HTML engine
> The Cobalt Authors forked H5VCC, removed most of the Chromium code -- in particular WebCore and the Chrome Renderer and Compositor -- and built up from scratch an implementation of a simplified subset of HTML, the CSS Box Model for layout, and the Web APIs that were really needed to build a full-screen SPA browse and play application.
So it's based on Chromium, but pretty far from it at this point.
"Based on Chromium" implies that the core rendering code that comprises Chromium is in this codebase, but this is not at all the case if you browse the source. Basically the only thing that this codebase shares with Chromium is a build system and some very low-level libraries (libbase, which is basically a standard library for C++)