Google Chrome has an inbuilt pop up blocker feature. The default option is set is Do not allow any site to show pop-ups. You can disable pop up blocker in Google Chrome using Options menu similar to ie8 pop up blocker
Click on the Options menu
And navigate to Under the Hood tab and Click on the Content settings button
In the Content settings window, navigate to Pop-ups tab and select Allow all sites to show pop-ups under the Pop-up Settings.