Have you given Chrome or any Chrome plugins any particular system privileges? I see in my Privacy preferences there is a section where apps can be listed which want access to your music and video activity?
Many Google servers are used by developers and companies other than Google for hosting various kinds of content and services. Any chance the servers' names end with "googleusercontent.com"? As an example, I see 1Password connecting to such a server. I'm pretty sure that's not Google collecting any information.
Grasping at straws...