Well not quite a Google Toolbar, but as close as we can get with no plugin API. Also this has a lot of the functionality of the SEOQuake addon for Firefox, so if your a webmaster or SEO these can be pretty useful for Chrome.
They are used just like bookmarks, so create a new bookmark, name it something self explanitory and for the URL place the corresponding code. Until we get real webmaster or SEO tools for Google Chrome these do a pretty good job of getting around the problem.
This will enable the following from Chrome when browsing: