[ntp4] Make top level Bookmark Manager links point to the bookmarks bar folder.
[ntp4] Make top level Bookmark Manager links point to the bookmarks bar folder.

BUG=95896
TEST=Click on 'Manage Bookmarks' at top level of NTP4 bookmarks page, should invoke the Bookmarks Bar folder.
Review URL: http://codereview.chromium.org/7976009

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@102206 0039d316-1c4b-4281-b951-d872f2087c98

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