requestAutocomplete (desktop): don't get stuck in infinite loop

chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h

Index: chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
diff --git a/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h b/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
index e8aa620784e368e6be4565c461d3fc9fe1bb8391..f02f5381eb4d7c620f1bebd70fe6190eadeb7529 100644
--- a/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
+++ b/chrome/browser/ui/cocoa/autofill/autofill_dialog_cocoa.h
@@ -51,7 +51,8 @@ class AutofillDialogCocoa : public AutofillDialogView,
                             FieldValueMap* output) override;
   virtual base::string16 GetCvc() override;
   virtual bool SaveDetailsLocally() override;
-  virtual const content::NavigationController* ShowSignIn() override;
+  virtual const content::NavigationController* ShowSignIn(
+      const GURL& url) override;
   virtual void HideSignIn() override;
   virtual void ModelChanged() override;
   virtual void OnSignInResize(const gfx::Size& pref_size) override;