Move GetDocument method from WebFrame to WebLocalFrame.

chrome/renderer/autofill/form_autocomplete_browsertest.cc

Index: chrome/renderer/autofill/form_autocomplete_browsertest.cc
diff --git a/chrome/renderer/autofill/form_autocomplete_browsertest.cc b/chrome/renderer/autofill/form_autocomplete_browsertest.cc
index a2d752a13ed7b9d8a74b5d46027bb65532759304..25d76aa2514b52ae867d218155798f49edfb479e 100644
--- a/chrome/renderer/autofill/form_autocomplete_browsertest.cc
+++ b/chrome/renderer/autofill/form_autocomplete_browsertest.cc
@@ -136,7 +136,7 @@ void VerifyNoSubmitMessagesReceived(
 
 // Simulates receiving a message from the browser to fill a form.
 void SimulateOnFillForm(autofill::AutofillAgent* autofill_agent,
-                        blink::WebFrame* main_frame) {
+                        blink::WebLocalFrame* main_frame) {
   WebDocument document = main_frame->GetDocument();
   WebElement element = document.GetElementById(WebString::FromUTF8("fname"));
   ASSERT_FALSE(element.IsNull());