Do not SendPasswordForms when LocalFrame is being detached

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 0397c3b7ffd4a80fb39fcdb8b8133cfcfd24b1ff..194d41976a1e02cd3de627ecf7eddaf54d5fca98 100644
--- a/components/autofill/content/renderer/password_autofill_agent.cc
+++ b/components/autofill/content/renderer/password_autofill_agent.cc
@@ -946,7 +946,12 @@ void PasswordAutofillAgent::SendPasswordForms(bool only_visible) {
     logger->LogBoolean(Logger::STRING_ONLY_VISIBLE, only_visible);
   }
 
-  blink::WebFrame* frame = render_frame()->GetWebFrame();
+  blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
+  // RenderFrameObserver::DidFinishLoad() can fire when Frame is
+  // detaching. crbug.com/654654
+  if (frame->isDetached())
+    return;
+
   // Make sure that this security origin is allowed to use password manager.
   blink::WebSecurityOrigin origin = frame->document().getSecurityOrigin();
   if (logger) {