Unreviewed, skipping new canvas tests that are failing on Gtk+ and Qt.

        Skip the following tests:
        - canvas/philip/tests/security.pattern.canvas.timing.html
        - canvas/philip/tests/security.pattern.create.html
        - canvas/philip/tests/security.pattern.cross.html
        - canvas/philip/tests/security.pattern.image.fillStyle.html
        - canvas/philip/tests/security.pattern.image.strokeStyle.html

        * platform/gtk/Skipped:
        * platform/qt/Skipped:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@71485 268f45cc-cd09-0410-ab3c-d52691b4dbfc