Do not trigger layout in PasswordAutofillAgent::DidFinishDocumentLoad

components/autofill/content/renderer/password_autofill_agent.cc

Index: components/autofill/content/renderer/password_autofill_agent.cc
diff --git a/components/autofill/content/renderer/password_autofill_agent.cc b/components/autofill/content/renderer/password_autofill_agent.cc
index fcbc6094fd5f004c9c89bbf908cef7cde68c2965..0174ba911d7e606b11df4fab3f6bbeb021544618 100644
--- a/components/autofill/content/renderer/password_autofill_agent.cc
+++ b/components/autofill/content/renderer/password_autofill_agent.cc
@@ -1136,6 +1136,7 @@ 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);
 }