Chrome’s URL bar is so fast that I generally don’t even bother with bookmarks anymore, but those who do might have noticed that they look a little different lately. In the latest version of the Chrome stable build for Android, there’s a new user-selectable flag that can enable or disable a different interface for the Bookmarks manager. It can be enabled (or disabled, if you prefer) in the Flags settings page: chrome://flags/#enhanced-bookmarks-experiment.
Chrome For Android 47 Tweaks The Bookmarks Interface With A Slide-Out Menu, At Least For Some was written by the awesome team at Android Police.
Source: Andriod Police