Get rid of redundant tab layout by installing incognito badge and adjusting tab strip before creating the tab strip controller.  BUG=none TEST=initial incognito tab layout should exactly match normal tab layout (including new tab button). Review URL: http://codereview.chromium.org/160397
Get rid of redundant tab layout by installing incognito badge and adjusting tab strip before creating the tab strip controller. 
BUG=none
TEST=initial incognito tab layout should exactly match normal tab layout (including new tab button).
Review URL: http://codereview.chromium.org/160397

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@22060 0039d316-1c4b-4281-b951-d872f2087c98

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