Note: The Chrome browser picks up the HTTP proxy settings configured on the host computer. By setting up your computer's built-in browser (e.g. Internet Explorer on Windows, or Safari on OS X), Chrome will be automatically configured to work with Burp Suite.
If you aren't sure where the built-in proxy settings are, open Chrome and go to the Customize menu.
In the Customize menu, select Settings, then click on "Show advanced settings".
In the "Advanced Settings" section, click the "Change proxy settings ..." button. This will open the relevant configuration options for your host computer.
Now refer to the relevant article (from the links below) for your computer's built-in browser to configure your proxy settings.