Fix download shelf item overflow on os x.

This was regressed by the subview layout refactoring.

BUG=14672
TEST=download several items, resize window, make sure that no download item ever overlaps the "Show all downloads" link on the right.

Review URL: http://codereview.chromium.org/173048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24683 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed