Add a runtime flag for distributing extra logical height to rowspans

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index 61f9922361fdaea582919ae3210b26292c638c33..380bb43f88ef04ad597e2182beece8fc0526bdb1 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -1821,3 +1821,39 @@ crbug.com/256226 [ Win7 Mac Linux Debug ] webmidi/requestmidiaccess.html [ Crash
 crbug.com/255714 [ Linux ] editing/execCommand/switch-list-type-with-orphaned-li.html [ Pass Failure ]
 
 Bug(cbiesinger) [ Win Mac ] fast/forms/button-default-title.html [ Failure ]
+
+# Following test cases should be executed only when RuntimeEnabledFeature 'RowSpanLogicalHeightSpreading' is enabled.
+crbug.com/78724 fast/table/table-rowspan-height-distribution-in-rows-1.html [ Failure ]
+
+# Below test cases need to rebaseline
+crbug.com/78724 [ Win ] fast/table/giantRowspan2.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] fast/table/giantRowspan2.html [ Failure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug13169.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug133756-1.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug133756-1.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug133756-2.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug133756-2.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug17138.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug17138.html [ Failure ]
+crbug.com/78724 [ Win Mac ] tables/mozilla/bugs/bug17548.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug220536.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug220536.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug73321.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug73321.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/bugs/bug7714.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug7714.html [ Failure ]
+crbug.com/78724 [ Win Mac ] tables/mozilla/core/bloomberg.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/core/row_span.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/core/row_span.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla/other/test6.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla/other/test6.html [ Failure ]
+crbug.com/78724 [ Win Mac ] tables/mozilla_expected_failures/bugs/bug1010.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla_expected_failures/bugs/bug131020-3.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla_expected_failures/bugs/bug131020-3.html [ Failure ]
+crbug.com/78724 [ Mac ] tables/mozilla_expected_failures/bugs/bug23847.html [ Failure ]
+crbug.com/78724 [ Win Mac ] tables/mozilla_expected_failures/bugs/bug58402-2.html [ Failure ]
+crbug.com/78724 [ Win ] tables/mozilla_expected_failures/bugs/bug65372.html [ ImageOnlyFailure ]
+crbug.com/78724 [ Mac ] tables/mozilla_expected_failures/bugs/bug65372.html [ Failure ]
+crbug.com/78724 [ Win Mac ] tables/mozilla_expected_failures/bugs/bug6933.html [ Failure ]
+crbug.com/78724 [ Mac ] tables/mozilla/bugs/bug8858.html [ Failure ]
+crbug.com/78724 [ Mac ] tables/mozilla/core/cell_heights.html [ Failure ]