Move GetDocument method from WebFrame to WebLocalFrame.

components/autofill/content/renderer/password_generation_agent.cc

Index: components/autofill/content/renderer/password_generation_agent.cc
diff --git a/components/autofill/content/renderer/password_generation_agent.cc b/components/autofill/content/renderer/password_generation_agent.cc
index f9fe4c97345751f016629265c79bd45d9554e130..237be9db857869b4e3d9cf33bc790b8d7b2f2b4b 100644
--- a/components/autofill/content/renderer/password_generation_agent.cc
+++ b/components/autofill/content/renderer/password_generation_agent.cc
@@ -589,7 +589,7 @@ void PasswordGenerationAgent::UserTriggeredGeneratePassword() {
     password_form = CreatePasswordFormFromWebForm(form, nullptr, nullptr);
     control_elements = form_util::ExtractAutofillableElementsInForm(form);
   } else {
-    const blink::WebFrame& frame = *render_frame()->GetWebFrame();
+    const blink::WebLocalFrame& frame = *render_frame()->GetWebFrame();
     blink::WebDocument doc = frame.GetDocument();
     if (doc.IsNull())
       return;