Col width is not honored when dynamically updated and it would not make table narrower

LayoutTests/fast/table/resize-table-width-using-col-width.html

Index: LayoutTests/fast/table/resize-table-width-using-col-width.html
diff --git a/LayoutTests/fast/table/resize-table-width-using-col-width.html b/LayoutTests/fast/table/resize-table-width-using-col-width.html
new file mode 100644
index 0000000000000000000000000000000000000000..484d3786c39ac24d0f2a3d9e9c62a4d4fa3d4bea
--- /dev/null
+++ b/LayoutTests/fast/table/resize-table-width-using-col-width.html
@@ -0,0 +1,25 @@
+<style>
+    col { width: 200px; }
+    td { background-color: #66f; height: 25px; }
+</style>
+<script type="text/javascript">
+    onload = function () {
+        var col = document.getElementById('thecol');
+        col.offsetTop;
+        col.style.width="100px";
+        checkLayout("td", document.getElementById("test-output"));
+    }
+</script>
+<script src="../../resources/check-layout.js"></script>
+Tests that the width of table cell changes on changing the colgroup width to new width.
+<table>
+    <colgroup>
+        <col id="thecol">
+    </colgroup>
+    <tbody>
+        <tr>
+            <td data-expected-width="100"></td>
+        </tr>
+    </tbody>
+</table>
+<div id="test-output"></div>