Do not trigger layout in PasswordAutofillAgent::DidFinishDocumentLoad

components/autofill/content/renderer/password_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/password_autofill_agent.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 1118 matching lines @@
                         OnFindFocusedPasswordForm)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
 }
 
 void PasswordAutofillAgent::DidFinishDocumentLoad() {
   // The |frame| contents have been parsed, but not yet rendered.  Let the
   // PasswordManager know that forms are loaded, even though we can't yet tell
   // whether they're visible.
+  form_util::ScopedLayoutPreventer layout_preventer;
   SendPasswordForms(false);
 }
 
 void PasswordAutofillAgent::DidFinishLoad() {
   // The |frame| contents have been rendered.  Let the PasswordManager know
   // which of the loaded frames are actually visible to the user.  This also
   // triggers the "Save password?" infobar if the user just submitted a password
   // form.
   SendPasswordForms(true);
 }
@@ skipping 390 matching lines @@
 }
 
 bool PasswordAutofillAgent::ProvisionallySavedPasswordIsValid() {
   return provisionally_saved_form_ &&
          !provisionally_saved_form_->username_value.empty() &&
          !(provisionally_saved_form_->password_value.empty() &&
          provisionally_saved_form_->new_password_value.empty());
 }
 
 }  // namespace autofill