offsetWidth on a table cell with fixed width is wrong

LayoutTests/fast/table/table-cell-offset-width.html

Index: LayoutTests/fast/table/table-cell-offset-width.html
diff --git a/LayoutTests/fast/table/table-cell-offset-width.html b/LayoutTests/fast/table/table-cell-offset-width.html
new file mode 100644
index 0000000000000000000000000000000000000000..0a77d227588c56928b878df62cb0f1b7f51a1596
--- /dev/null
+++ b/LayoutTests/fast/table/table-cell-offset-width.html
@@ -0,0 +1,10 @@
+<table><td style="font: Ahem; width: 10px">FAIL</td></table>
+<script>
+if (window.testRunner)
+	testRunner.dumpAsText();
+// crbug.com/290399 reported that offsetWidth on a table cell
+// would incorrectly return the specified width instead of the layout-expanded width.
+// When this would fail, it would be 12px instead of the 36px 'FAIL' expands to in Ahem.
+var width = document.getElementsByTagName('td')[0].offsetWidth;
+document.body.textContent = (width == 36 ? "PASS" : "FAIL") + " (" + width + "px)";
+</script>