Bug 1503922 [wpt PR 13835] - Make Element#innerText not to emit Tab/Newline for <td>/<tr>/<br> itself, a=testonly

Automatic update from web-platform-testsMake Element#innerText not to emit Tab/Newline for <td>/<tr>/<br> itself

This patch changes |Element#innerText| not to emit Tab/Newline for <td>, <br>,
<tr> itself to follow the spec change[1] for improving interop.

Example:
 - <br>.innerText -> "" (was "\n")
 - <td>abc</td>.innerText -> "abc" (was "abc\t")
 - <tr><td>abc</td></tr>.innerText -> "abc" (was "abc\n")

[1] https://github.com/whatwg/html/pull/4132 Make innerText getter not run the
algorithm on the element itself

Bug: 897373
Cq-Include-Trybots: luci.chromium.try​:linux_layout_tests_layout_ng
Change-Id: I4266ee28df9b44e9044dfa60c2d54257a5f82eeb
Reviewed-on: https://chromium-review.googlesource.com/c/1312436
Reviewed-by: Yoichi Osato <yoichio@chromium.org>
Commit-Queue: Yoshifumi Inoue <yosin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604872}

--

wpt-commits: ff0b6d883e558c94a2302985d424606a80ed5200
wpt-pr: 13835

testing/web-platform/tests/html/dom/elements/the-innertext-idl-attribute/getter-tests.js

@@ -251,6 +251,8 @@ testText("<div><table style='border-collapse:collapse'><tr><td>abc<td>def</table
 testText("<div><table><tfoot>x</tfoot><tbody>y</tbody></table>", "xy", "tfoot not reordered");
 testText("<table><tfoot><tr><td>footer</tfoot><thead><tr><td style='visibility:collapse'>thead</thead><tbody><tr><td>tbody</tbody></table>",
          "footer\n\ntbody", "");
+testText("<table><tr><td id=target>abc</td><td>def</td>", "abc", "No tab on table-cell itself");
+testText("<table><tr id=target><td>abc</td><td>def</td></tr><tr id=target><td>ghi</td><td>jkl</td></tr>", "abc\tdef", "No newline on table-row itself");
 
 /**** Table captions ****/