WebLayer is a high level embedding API to support building a browser.
Unlike src/content, which is only concerned with a sandboxed multi-process web platform, WebLayer includes modern browser features and Google integration. It's the reusable version of Chrome, which might share some portions of the UI and also its support for all the modern HTML5 and browser features (e.g. UI for permissions, autofill, safe browsing etc...).
While it's built on top of src/content, the expectation is that the API will hide the Content API.
Mailing list: firstname.lastname@example.org
Bug tracker: Internals>WebLayer
public the C++ and Java public API. These are the only files an app should use
shell sample app
browser internal code which runs in the browser process
common internal code which runs in the browser and child processes
renderer internal code which runs in the renderer process