Chrome for Android has been developed separately from the main Chrome, a fork, so there is no open source version of it. This means that the AOSP (Android Open Source Project) will continue to use the regular browser for the time being.
It also means that projects such as Cyanogen won't be able to use Chrome for Android as the default browser. In fact, Chrome for Android will be part of the regular Google apps suite for Android, along with Google Search, Maps, Gmail and so on.
That said, the code will be moved back to the Chromium repositories and further upstream to WebKit, for example, so there will be a Chromium for Android eventually.
"Much of the code for Chrome for Android is already shared with Chromium and over the coming weeks, the Chromium team will be upstreaming many new components developed for Chrome for Android to Chromium, WebKit and other projects," Google
explained.