Mark two writing-modes tests as WontFix

LayoutTests/NeverFixTests

 # This file should only include tests that we never intend to fix.
 # There should only be 4 categories of tests here:
 #   1. Test harness tests.
 #   2. Tests enabled by chromium embedders (e.g. Opera).
 #   3. Tests that apply to some platforms but not others.
 #   4. Tests that are too slow in Debug and so we only want to skip them in Debug.
 
 # FIXME: Remove the WontFix keyword and have that be implied. That way, people won't abuse
 # WontFix outside of this file.
 
@@ skipping 142 matching lines @@
 
 # Subpixel font scaling requires DirectWrite on windows (which isn't supported
 # on XP) and antialiasing on mac (which isn't enabled tests).
 [ XP Mac ] fast/text/sub-pixel/text-scaling-ltr.html [ WontFix ]
 [ XP Mac ] fast/text/sub-pixel/text-scaling-pixel.html [ WontFix ]
 [ XP Mac ] fast/text/sub-pixel/text-scaling-rtl.html [ WontFix ]
 [ XP Mac ] fast/text/sub-pixel/text-scaling-vertical.html [ WontFix ]
 [ XP Mac ] fast/text/sub-pixel/text-scaling-webfont.html [ WontFix ]
 [ Mac ] fast/text/mixed-direction-bidi-wrap.html [ WontFix ]
 
+# Mac 10.6 debug only, and the tests are very artificial to test orientation of all code points.
+[ SnowLeopard Debug ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001k.html [ WontFix ]
+[ SnowLeopard Debug ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001m.html [ WontFix ]
+
 # We don't have the necessary fonts for these tests on XP.
 [ XP ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001f.html [ WontFix ]
 [ XP ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001g.html [ WontFix ]
 [ XP ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001h.html [ WontFix ]
 [ XP ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001l.html [ WontFix ]
 [ XP ] imported/csswg-test/css-writing-modes-3/text-orientation-script-001o.html [ WontFix ]
 
 # Relies on precise timing which isn't reliable on XP.
 [ XP ] imported/web-platform-tests/user-timing/test_user_timing_mark.html [ WontFix ]
 
 # We don't have full plane2 support on XP.
 [ XP ] fast/text/international/plane2.html [ WontFix ]
 
 # These two printing tests fail with the threaded compositor but they
 # aren't critical to run in this mode.
 virtual/threaded/printing/setPrinting.html [ WontFix ]
 virtual/threaded/printing/width-overflow.html [ WontFix ]
 
 # This test only fails with an ASSERT in Debug build.
 [ Release ] editing/input/orphan-set-selection-range.html [ WontFix ]