Add new auto-login UI.

When the WebView notifies us of an auto-login request, check if the account is
valid.  If so, use it to log into the account manager.  If that fails or the
account is not valid, display the login UI.

Bug: 3367381
Change-Id: I5a164ef676921eec03a89860fa5be722d3d987d4
diff --git a/src/com/android/browser/UI.java b/src/com/android/browser/UI.java
index 13f8af2..368c829 100644
--- a/src/com/android/browser/UI.java
+++ b/src/com/android/browser/UI.java
@@ -124,9 +124,12 @@
 
     boolean dispatchKey(int code, KeyEvent event);
 
-
     public static interface DropdownChangeListener {
         void onNewDropdownDimensions(int height);
     }
     void registerDropdownChangeListener(DropdownChangeListener d);
+
+    void showAutoLogin(Tab tab);
+
+    void hideAutoLogin(Tab tab);
 }