[ntp4] Disable the bookmarks delete button, for now.
[ntp4] Disable the bookmarks delete button, for now.

BUG=95584
TEST=Bookmark tiles should no longer have delete buttons in the upper right corner.
Review URL: http://codereview.chromium.org/7840019

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@99996 0039d316-1c4b-4281-b951-d872f2087c98

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