>A botnet is a collection of compromised computers connected to the Internet (these are also known as 'bots'). When a computer becomes compromised, it becomes a part of a botnet. Botnets are usually controlled via standards based network protocols such as IRC and http.

Regular botnet:

>User installs program that may have function
>Program sends data to the botnet in the background
>Often pops up ads and redirects requests
>Tracks user information and sends statistics to the C&C
>Can send commands like auto-updates

Chrome:

>User installs program that has a function (browsing)
>Chrome sends data to Google in the background
>Has ads in the new tab page among other things
>Redirects requests at times based on mass user tracking
>Tracks user browsing behavior, all searches, etc, sends it to Google (C&C)
>Can auto-update itself
>Ability to run in the background even if the browser is closed

How is this not a botnet?