layout: Add *very* basic support for table layout (#31121)

* layout: Add *very* basic support for table layout

This is the first step to proper table layout. It implements a naive
layout algorithm, notably only taking into account the preferred widths
of the first table row. Still, it causes some float tests to start
passing, so turn on the `layout.tables.enabled` preference for those
directories.

Co-authored-by: Oriol Brufau <obrufau@igalia.com>

* Address review comments

* Fix a crash with rowspan=0

* Turn on pref and update results for `/css/css-tables` and `/css/CSS2/tables`

---------

Co-authored-by: Oriol Brufau <obrufau@igalia.com>

tests/wpt/meta/css/css-tables/tentative/baseline-table.html.ini

@@ -1,10 +1,4 @@
 [baseline-table.html]
-  [.container 1]
-    expected: FAIL
-
-  [.container 2]
-    expected: FAIL
-
   [.container 3]
     expected: FAIL
 
@@ -17,18 +11,6 @@
   [.container 6]
     expected: FAIL
 
-  [.container 7]
-    expected: FAIL
-
-  [.container 8]
-    expected: FAIL
-
-  [.container 9]
-    expected: FAIL
-
-  [.container 10]
-    expected: FAIL
-
   [.container 11]
     expected: FAIL
 
@@ -40,6 +22,3 @@
 
   [.container 14]
     expected: FAIL
-
-  [.container 15]
-    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/caption.html.ini

@@ -22,3 +22,15 @@
 
   [table 10]
     expected: FAIL
+
+  [table 4]
+    expected: FAIL
+
+  [table 5]
+    expected: FAIL
+
+  [table 12]
+    expected: FAIL
+
+  [table 13]
+    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/colspan-redistribution.html.ini

@@ -59,9 +59,6 @@
   [table 20]
     expected: FAIL
 
-  [table 21]
-    expected: FAIL
-
   [table 22]
     expected: FAIL
 

tests/wpt/meta/css/css-tables/tentative/rowspan-height-redistribution.html.ini

@@ -64,3 +64,6 @@
 
   [table 24]
     expected: FAIL
+
+  [table 20]
+    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/table-quirks.html.ini

@@ -5,11 +5,5 @@
   [table 2]
     expected: FAIL
 
-  [table 3]
-    expected: FAIL
-
   [table 5]
     expected: FAIL
-
-  [table 6]
-    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/tbody-height-redistribution.html.ini

@@ -31,3 +31,6 @@
 
   [table 12]
     expected: FAIL
+
+  [table 10]
+    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/td-box-sizing-002.html.ini

@@ -2,20 +2,5 @@
   [.t 6]
     expected: FAIL
 
-  [.t 10]
-    expected: FAIL
-
-  [.t 11]
-    expected: FAIL
-
-  [.t 12]
-    expected: FAIL
-
   [.t 13]
     expected: FAIL
-
-  [.t 14]
-    expected: FAIL
-
-  [.t 15]
-    expected: FAIL

tests/wpt/meta/css/css-tables/tentative/td-box-sizing-003.html.ini

@@ -13,3 +13,21 @@
 
   [table 11]
     expected: FAIL
+
+  [table 1]
+    expected: FAIL
+
+  [table 4]
+    expected: FAIL
+
+  [table 5]
+    expected: FAIL
+
+  [table 6]
+    expected: FAIL
+
+  [table 7]
+    expected: FAIL
+
+  [table 10]
+    expected: FAIL