Googler here. We have the same Code Search tool internally, this is honestly one of my favorite things about working at Google. Great to see this open sourced.
Chromium also has its code indexed by the older version of this tool: https://cs.chromium.org/
Chromium recently switched over to a new version of code search.
Compare that to the redesign where each xref jump has me staring at a spinner for half a second, the xref bar has no visual separation between type, filename, and code snippet, all buttons visually indistinguishable with a blue on white color scheme, the "layers" dropdown is replaced with a mishmash of buttons scattered across the layout, etc.
I really hope they're not forcing this abhorrent redesign on their developers as well.