[Autofill] Close mojo interface bindings of autofill/password agent in time.

components/autofill/content/renderer/autofill_agent.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/renderer/autofill_agent.h"
 
 #include <stddef.h>
 
 #include <tuple>
 
@@ skipping 262 matching lines @@
     GetAutofillDriver()->WillSubmitForm(form_data, base::TimeTicks::Now());
     submitted_forms_.insert(form_data);
   }
 
   if (form_submitted) {
     GetAutofillDriver()->FormSubmitted(form_data);
   }
 }
 
 void AutofillAgent::Shutdown() {
+  binding_.Close();
   legacy_.Shutdown();
   weak_ptr_factory_.InvalidateWeakPtrs();
 }
 
 void AutofillAgent::FocusChangeComplete() {
   WebDocument doc = render_frame()->GetWebFrame()->document();
   WebElement focused_element;
   if (!doc.isNull())
     focused_element = doc.focusedElement();
   if (!focused_element.isNull()) {
@@ skipping 520 matching lines @@
 void AutofillAgent::LegacyAutofillAgent::OnDestruct() {
   // No-op. Don't delete |this|.
 }
 
 void AutofillAgent::LegacyAutofillAgent::FocusChangeComplete() {
   if (agent_)
     agent_->FocusChangeComplete();
 }
 
 }  // namespace autofill