How to upgrade to chrome 64 bit? Finally there should be a version of Chrome 64 bit for Mac.

I received an email from google groups: 


  Switch the Mac build from 32-bit to 64-bit.
  
  As of M39, Chrome is a 64-bit only binary. This changes the default
  build configuration to 64-bit globally. After this CL, the 32-bit Mac
  build is no longer supported.


Now, while this is good news, I wonder how to do that without losing all my bookmarks, cookies, passwords that are in my current version of Chrome 

Can somebody help?
Chrome is updated automatically by a process that runs in the background. Though sometimes I have to launch it and update it from the"About Chrome" menu selection, that may me being to picky avoid what Little Snitch tells me about...

Anyway you don't (or shouldn't) have to do anything, it will update all by itself with no loss of anything. Just check "About Chrome" in the Chrome menu.