[autofill] Hook the sign-in button up to required actions.

chrome/browser/ui/autofill/autofill_dialog_view.h

Index: chrome/browser/ui/autofill/autofill_dialog_view.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_view.h b/chrome/browser/ui/autofill/autofill_dialog_view.h
index 5f7b6ab6b27505b35cd09fb77c698d391c0f9816..32738307de94b6318b17394bb70c9ba4cd218598 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_view.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_view.h
@@ -28,6 +28,10 @@ class AutofillDialogView {
   // Called when a different notification is available.
   virtual void UpdateNotificationArea() = 0;
 
+  // Called when account details may have changed (user logs in to GAIA, creates
+  // a new account, etc.).
+  virtual void UpdateAccountChooser() = 0;
+
   // Called when the contents of a section have changed.
   virtual void UpdateSection(DialogSection section) = 0;