[mathml] Fix displaystyle-011.html

mtable sets displaystyle to false [1] so add an
appropriate stylesheet entry for it, i.e.
math-style: compact. This makes displaystyle-011.html
pass.

[1] https://mathml-refresh.github.io/mathml-core/#table-or-matrix-mtable

Bug: 6606
Change-Id: I376698e43153d6893b5bd826bb7625563cbab030
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2464269Reviewed-by: Frédéric Wang <fwang@igalia.com>
Commit-Queue: Rob Buis <rbuis@igalia.com>
Cr-Commit-Position: refs/heads/master@{#816249}

third_party/blink/renderer/core/css/mathml.css

@@ -74,6 +74,11 @@ mi {
   text-transform: math-auto;
 }
 
+/* Tables */
+mtable {
+  math-style: compact;
+}
+
 /* Fractions */
 mfrac {
   padding-inline-start: 1px;
@@ -121,4 +126,3 @@ mover[accent="true" i] > :first-child,
 munderover[accent="true" i] > :first-child {
   math-shift: compact;
 }
-

third_party/blink/web_tests/TestExpectations

@@ -1193,7 +1193,6 @@ crbug.com/6606 external/wpt/mathml/presentation-markup/tables/table-001.html [ F
 crbug.com/6606 external/wpt/mathml/presentation-markup/tables/table-002.html [ Failure ]
 crbug.com/6606 external/wpt/mathml/presentation-markup/tables/table-axis-height.html [ Failure ]
 crbug.com/6606 external/wpt/mathml/relations/css-styling/attribute-mapping-002.html [ Failure ]
-crbug.com/6606 external/wpt/mathml/relations/css-styling/displaystyle-011.html [ Failure ]
 crbug.com/6606 external/wpt/mathml/relations/css-styling/displaystyle-1.html [ Failure ]
 crbug.com/6606 external/wpt/mathml/relations/css-styling/displaystyle-2.html [ Failure ]
 crbug.com/6606 external/wpt/mathml/relations/css-styling/ignored-properties-001.html [ Failure Timeout ]