1. Click the Chrome menu icon in the top right corner of the browser window.
2. Select Tools followed by Clear browsing data.
3. In the dialog that appears, select the checkboxes for Delete cookies and other site and plugin data and Empty the cache.
4. Use the menu at the top to select the amount of data that you want to delete. Select the "beginning of time" to delete everything.
5. To finish, click Clear browsing data.