I am not familiar with Chrome but this is what it says on their website:
Google Bookmarks
Google Chrome bookmarks are separate from those saved in Google Bookmarks. While it's currently not possible to automatically sync these two sets of bookmarks, you can use a bookmarklet to easily create Google Bookmarks in Google Chrome.
Drag this bookmarklet to the Google Chrome bookmarks bar: Google Bookmark
Any time you visit a webpage that you want to save to your Google Bookmarks page, simply click the bookmarklet in the bookmarks bar.