Bookmarks listen for account pref changes

 Bug: 3373817
 Fixed it so the bookmark page listens for when the chrome sync account
 changes. When the account changes, the bookmarks page then refreshes
 the account info and all is well.

 Also deleted unreachable code.

Change-Id: If21f0fde552c40aa622961c7c896bdf6f6299ccb
2 files changed