[Password Generation] Handle DidFinishLoad event in PasswordGenerationAgent as well

components/autofill/content/renderer/password_generation_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/password_generation_agent.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 161 matching lines @@
     if (editing_popup_shown_) {
       password_generation::LogPasswordGenerationEvent(
           password_generation::EDITING_POPUP_SHOWN);
     }
     editing_popup_shown_ = false;
   }
 
   FindPossibleGenerationForm();
 }
 
+void PasswordGenerationAgent::DidFinishLoad() {
+  // Since forms on some sites are available only at this event (but not at
+  // DidFinishDocumentLoad), again call FindPossibleGenerationForm to detect
+  // these forms (crbug.com/617893).
+  FindPossibleGenerationForm();
+}
+
 void PasswordGenerationAgent::OnDestruct() {
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }
 
 void PasswordGenerationAgent::OnDynamicFormsSeen() {
   FindPossibleGenerationForm();
 }
 
 void PasswordGenerationAgent::FindPossibleGenerationForm() {
   if (!enabled_ || !render_frame())
@@ skipping 355 matching lines @@
   GetAccountCreationPasswordFields(control_elements, &password_elements);
   password_elements = FindPasswordElementsForGeneration(
       password_elements, last_focused_password_element_.nameForAutofill());
   generation_form_data_.reset(new AccountCreationFormData(
       make_linked_ptr(password_form.release()), password_elements));
   is_manually_triggered_ = true;
   ShowGenerationPopup();
 }
 
 }  // namespace autofill