Autofill: Fix broken DCHECK from r320637.

components/autofill/content/renderer/form_autofill_util.cc

Index: components/autofill/content/renderer/form_autofill_util.cc
diff --git a/components/autofill/content/renderer/form_autofill_util.cc b/components/autofill/content/renderer/form_autofill_util.cc
index 5977300794df57f4e2269a4affb18d958c5abf51..fce56a0d1d85a08442536514ee05b096603afde5 100644
--- a/components/autofill/content/renderer/form_autofill_util.cc
+++ b/components/autofill/content/renderer/form_autofill_util.cc
@@ -134,9 +134,9 @@ bool SatisfiesRequireAutocomplete(const WebInputElement& input_element) {
   return input_element.autoComplete();
 }
 
-// Returns the colspan for a <td>. Defaults to 1.
+// Returns the colspan for a <td> / <th>. Defaults to 1.
 size_t CalculateTableCellColumnSpan(const WebElement& element) {
-  DCHECK(element.hasHTMLTagName("td"));
+  DCHECK(element.hasHTMLTagName("td") || element.hasHTMLTagName("th"));
 
   size_t span = 1;
   if (element.hasAttribute("colspan")) {