[Password Manager] Use XHR completion as a possible signal for form submission

components/autofill/content/renderer/autofill_agent.cc

Index: components/autofill/content/renderer/autofill_agent.cc
diff --git a/components/autofill/content/renderer/autofill_agent.cc b/components/autofill/content/renderer/autofill_agent.cc
index 25f63ef7d69a0fdbe37d3400ef4d75b37e34b559..4f0dac3b7997ba24e3e6ccf6ef1fa2517ae94681 100644
--- a/components/autofill/content/renderer/autofill_agent.cc
+++ b/components/autofill/content/renderer/autofill_agent.cc
@@ -768,6 +768,14 @@ void AutofillAgent::didAssociateFormControls(const WebVector<WebNode>& nodes) {
   }
 }
 
+void AutofillAgent::didRemoveFormControls(const WebVector<WebNode>& nodes) {
+  password_autofill_agent_->OnFormElementsRemoved(nodes);
+}
+
+void AutofillAgent::XHRSucceeded() {
+  password_autofill_agent_->XHRSucceeded();
+}
+
 // LegacyAutofillAgent ---------------------------------------------------------
 
 AutofillAgent::LegacyAutofillAgent::LegacyAutofillAgent(