Google has dropped support for the 32-Bit version of Chrome on Linux distributions. Users will still be able to use the 32-Bit version if they have it installed. However, they will no longer receive updates.
Chrome is already 64-Bit only on Mac OSX. Windows has a 32-Bit version and a 64-Bit version available as of now, but you know where all this is going. If you are a Chromium user on Linux, the 32-Bit version will still be supported.
From this March, only 64-bit versions on Ubuntu 14.04 LTS (or later) will receive updates. It is recommended that you upgrade to a 64-bit version of Chrome before that deadline.
Here is the official announcement:
To provide the best experience for the most-used Linux versions, we will
end support for Google Chrome on 32-bit Linux, Ubuntu Precise (12.04), and
Debian 7 (wheezy) in early March 2016. Chrome will continue to function
on these platforms but will no longer receive updates and security fixes.
We intend to continue supporting the 32-bit build configurations on Linux
to support building Chromium. If you are using Precise, we=E2=80=99d recomm=
you upgrade to Trusty.
Upgrading to 64-Bit
To upgrade, go to the download page, click Download Chrome and choose the 64-Bit version. Follow the usual installation prompts to complete your installation.
Via OMG Ubuntu.