Please, note that I used Google Chrome version 39.0.2171.95 m, hence the configuration/settings location might be different for lower versions.
As usual, let us go straight to the matter.
How do we go about the configuration?
Step 1: Click the menu button under the close/cancel button. Click 'Settings' from the drop-down menu list. See the pix below:
Step 2: Scroll down and click 'Change proxy settings...' under 'Network' option. Please, click 'show advanced settings' if you can find it and the text appears at the bottom of the page. See attached pix for reference:
Step 2: Click 'Connections' tab, Select the network settings you wish to change the proxy settings, next click 'Settings'.
Note that I had selected MTN Nigeria option in my reference pix, but yours does not necessarily need to be that option except you want to use for the same purpose as mine. Just select the network settings you want to change the proxy settings. I chose MTN Nigeria because I wanted to use her blackberry internet service to browse on my computer. See my previous post here if you are also interested.
Step 3: Finally, select 'use a proxy server for this connection' and enter your desired proxy settings. See attached pix as usual:
Wishing you all good luck.