Google yesterday started the roll-out of Material Design to Chrome browser in the Canary branch for Windows. Google has made a lot of changes to the UI. Some of the changes include tab shape, single tab mode, omnibox suggestion icons, tab strip coloring, pinned tabs and alert indicators. Chrome team is actively developing this design change, so you might face some issues here and there. Since the design has already hit the Canary branch, you can expect these changes in the public branch in the coming months.