GitLab

Duplicating sadtab.png to use as killtab.png

until UI team creates production image.

BUG=chromium-os:10711
TEST=checked to make sure the old killtab image isn't shown.

Review URL: http://codereview.chromium.org/6334006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71709 0039d316-1c4b-4281-b951-d872f2087c98