For unknown reason, Google Chrome for OS X is keeping older versions of itself inside the app bundle. You can recover up to GB of hard disk space by removing old versions of Google Chrome.
Go to Finder and look under “\Applications” folder for Google Chrome app. Right click on the icon, and on the popup menu select “Show Package Contents”. Navigate to Contents > Versions. Delete all version folders except for the latest.
Depending on your setup, we have seen people saving up to 6GB of hard disk space by removing unused “versions” of Google Chrome for OS X. Give it a try and leave us comments on how much space you have saved up using this method.