As of last week, Chromium is now indexed within mxr.mozilla.org!
This is an oft-requested bit of functionality. The main benefit is simplicity- rather than having to go to Google’s Chromium code search, it’s already right in the tool you already use for Mozilla code.
This uses the “Last Known Good Revision” checkout, described here.
As always, bugs can be opened in Webtools::MXR.