Hm, but how can I update the address bar when users will be surfing through a report pages... Otherwise, it's going to be tricky for them how to copy and share the page they are looking at.

Can we just embed the analytics into the reports themselves?

Otherwise you might be able to do something with URL fragments or HTML5 history API

We can, but there are so many pages... How bad it would be if the server could go to GCS, read a particular page, and serve it back to a user? That feels like an overhead, but on the other head that way we can do whatever we need with any page without having to update anything except of the server code. For example, issue 827220 can be implemented using that approach. I should at least give it a try, I guess.

The following revision refers to this bug:
  https://chrome-internal.googlesource.com/chrome/tools/code-coverage/+/3bc3352c5eb31ba62a99eac3cb91b0106d10271f

commit 3bc3352c5eb31ba62a99eac3cb91b0106d10271f
Author: Max Moroz <mmoroz@google.com>
Date: Tue May 08 19:50:25 2018