[EditingNG] Make "editing/deleting/5032066.html" to test all platform behaviors

This patch chnages "5032066.html" to test all platform behaviors instead to
detect failure on locally for all platforms for ease of debugging.

Bug: 707656
Change-Id: I5f7e477a88b6fdaefe98ec34567f927a9f159dad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2259700
Auto-Submit: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781220}

third_party/blink/web_tests/editing/deleting/5032066.html

@@ -2,47 +2,40 @@
 <script src="../../resources/testharness.js"></script>
 <script src="../../resources/testharnessreport.js"></script>
 <script src="../assert_selection.js"></script>
-<div id="log"></div>
 <script>
-const isMac = navigator.platform.indexOf('Mac') === 0;
-selection_test(
+for (const platform of ['android', 'mac', 'unix', 'win']) {
+    if (window.internals)
+        internals.settings.setEditingBehavior(platform);
+    const details = platform === 'mac'
+        ? 'The content in the deleted paragraph should be moved into the last table cell unless that content is another table.'
+        : 'The content in the deleted paragraph should not be merged into the table above.';
+    const description = `${platform}: Deleting when the caret is at the start of a paragraph just after a table. ${details}`;
+    selection_test(
       [
-    '<div contenteditable="true" id="root">',
-        '<table border="1">',
-            '<tr>',
-                '<td>All the content in this editable region </td>',
-            '</tr>',
-         '</table>',
-         '<div id="div">|should be in one table cell.</div>',
+        '<div contenteditable>',
+            '<table><tbody><tr>',
+                    '<td>abc</td>',
+             '</tr></tbody></table>',
+             '<div>|XYZ</div>',
         '</div>'
       ],
       'Delete',
-  isMac
+      platform === 'mac'
         ? [
-        '<div contenteditable="true" id="root">',
-            '<table border="1">',
-                '<tbody>',
-                    '<tr>',
-                        '<td>All the content in this editable region |should be in one table cell.</td>',
-                    '</tr>',
-                '</tbody>',
-            '</table>',
+            '<div contenteditable>',
+                '<table><tbody><tr>',
+                    '<td>abc|XYZ</td>',
+                '</tr></tbody></table>',
             '</div>'
           ]
         : [
-        '<div contenteditable="true" id="root">',
-            '<table border="1">',
-                '<tbody>',
-                    '<tr>',
-                        '<td>All the content in this editable region </td>',
-                    '</tr>',
-                '</tbody>',
-            '</table>',
-            '|should be in one table cell.',
+            '<div contenteditable>',
+                '<table><tbody><tr>',
+                    '<td>abc</td>',
+                '</tr></tbody></table>',
+                '|XYZ',
             '</div>'
           ],
-  'Deleting when the caret is at the start of a paragraph just after a table' +
-  isMac
-    ? 'The content in the deleted paragraph should be moved into the last table cell unless that content is another table.'
-    : 'The content in the deleted paragraph should not be merged into the table above.');
+      description);
+}
 </script>