Mark several text layout tests as failing on Mac

fast/text/atsui-spacing-features.html
fast/text/emphasis-complex.html
fast/text/international/hebrew-vowels.html
svg/text/combining-character-queries.html
svg/text/ligature-queries.html
svg/text/surrogate-pair-queries.html

TBR=drott@chromium.org

Bug: 925866
Change-Id: Iafb0f31852b96c46a725e404e85debd875d96ed5
Reviewed-on: https://chromium-review.googlesource.com/c/1440021Reviewed-by: Kevin McNee <mcnee@chromium.org>
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#626634}

third_party/blink/web_tests/TestExpectations

@@ -5858,3 +5858,22 @@ crbug.com/924670 external/wpt/webvr/webvr-supported-by-feature-policy.html [ Fai
 
 # Sheriff 2019-01-25
 crbug.com/925325 [ Mac ] storage/indexeddb/index-population.html [ Pass Failure ]
+
+# Sheriff 2019-01-28
+crbug.com/925866 [ Mac10.10 ] fast/text/atsui-spacing-features.html [ Failure ]
+crbug.com/925866 [ Mac10.10 ] fast/text/emphasis-complex.html [ Failure ]
+crbug.com/925866 [ Mac10.10 ] fast/text/international/hebrew-vowels.html [ Failure ]
+crbug.com/925866 [ Mac10.10 ] svg/text/combining-character-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.10 ] svg/text/ligature-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] fast/text/atsui-spacing-features.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] fast/text/emphasis-complex.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] fast/text/international/hebrew-vowels.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] svg/text/combining-character-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] svg/text/ligature-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.11 ] svg/text/surrogate-pair-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] fast/text/atsui-spacing-features.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] fast/text/emphasis-complex.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] fast/text/international/hebrew-vowels.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] svg/text/combining-character-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] svg/text/ligature-queries.html [ Failure ]
+crbug.com/925866 [ Mac10.12 ] svg/text/surrogate-pair-queries.html [ Failure ]