Add password form search using blink::WebNode reference comparison.

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 9677f8c184a7bfb23fe3f38e50ed461c3b9d9150..51c745fdb5253cc1f0c28c746ea1f677beb2a098 100644
--- a/components/autofill/content/renderer/form_autofill_util.cc
+++ b/components/autofill/content/renderer/form_autofill_util.cc
@@ -1203,6 +1203,7 @@ bool ExtractFormData(const WebFormElement& form_element, FormData* data) {
 }
 
 bool IsFormVisible(blink::WebFrame* frame,
+                   const blink::WebFormElement& form_element,
                    const GURL& canonical_action,
                    const GURL& canonical_origin,
                    const FormData& form_data) {
@@ -1226,6 +1227,11 @@ bool IsFormVisible(blink::WebFrame* frame,
     if (!AreFormContentsVisible(form))
       continue;
 
+    // Try to match the WebFormElement reference first.
+    if (!form_element.isNull() && form == form_element) {
+      return true;  // Form still exists.
+    }
+
     GURL iter_canonical_action = GetCanonicalActionForForm(form);
     bool form_action_is_empty = iter_canonical_action.is_empty() ||
                                 iter_canonical_action == frame_origin;