Let’s start with two quick facts:
1. Google recently refurbished Google Bookmarks (after neglecting them for a couple of years), giving them more importance in search and allowing us to share them with friends more easily.
2. Meanwhile, a different team (I guess), implemented Bookmark Sync from Chrome, a new features that synchronizes bookmarks with a Google account (quite handy when you routinely use Chrome on many computers). Those bookmarks end up in a read-only directory in your Google Docs space.