Simplified BoxPainter edge adjacency test.

Minor cleanup: the current test is unnecessarily complex and can be
reduced to a much simpler form.

R=fs@opera.com,junov@chromium.org

Review URL: https://codereview.chromium.org/1139413002

git-svn-id: svn://svn.chromium.org/blink/trunk@195483 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed