options: Open Google Dashboard link in a new tab
options: Open Google Dashboard link in a new tab

BUG=112137
TEST=sign into Chrome, open settings page, click Google Dashboard link

Review URL: https://chromiumcodereview.appspot.com/9310006

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@120028 0039d316-1c4b-4281-b951-d872f2087c98

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