This is a small tip for some people that do not know how to setup socks proxy server in Google Chrome. The example pictures below may have a little different from what you see because of the different between my and your Google Chrome version. Currently, I'm using version 39.0.2171.95 m (in order to find down your version, just input to your address bar as follows: chrome://chrome/).
First of all, go to your Setting panel by click on Tools icon and choose Settings.
Google Chrome Tools menu.
Then, try to find the line "Show advanced settings..." and the end of the page if exist (some version will display advanced settings by default when clicking on "Settings", so you need not to click "Show advanced settings" anymore). After that, you will see the "Change proxy settings..." button, click on it.
Google Chrome's "Change proxy settings..." button.
Next, click on "LAN settings", and then, stick the "Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections)" and choose "Advanced", you will see the small window look like the picture below.
Proxy settings window of Microsoft Window OS.
Fill into the line Socks your proxy server IP at the first textbox and your server port at the second textbox. These options you will be received from your administrator or server manager or you may need to pay for a service to get these informations. Ex: your server IP is 188.8.131.52 and your port is 8080, your service provider will tell you this. Finally, click OK, OK and still OK. If your socks server is working well, you can surf website well. You also could check your configuration by going to http://www.whatismyip.com/ and see if that website tell you your ip is your socks server ip or not.
In order to roll back your setting when you can not using internet after configuration because of your socks server or your steps. Just uncheck the option "Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections)" at the previous step.