At this time, Google Chrome Bookmarks are not compatible with Google Bookmarks. If you'd like to add your Chrome bookmarks to Google Bookmarks, we recommend that you first export your bookmarks from Chrome and use the steps outlined in our importing bookmarks into Google Bookmarks help article.
You can also use the Bookmarks bookmarklet when using Chrome. Simply drag this bookmarklet to your browser's bookmarks bar: Google Bookmark
Note: You may need to press Ctrl+B (PC) or ⌘+B (Mac) to make your bookmarks bar appear.