Retrieve the original content of a webpage that was browsed in Chrome?
Follow the instructions on View webpages cached in Google Search Results

The gist is:
1. On your computer, do a Google search for the page you want to find.
2. Click the green down arrow to the right of the site's URL.
3. Click Cached.  

There also are other sites that do that for you, for instance http://cachedview.com/