add navigation to menu again

    Bug: 5021497
    re-enabled the navigation menu items
    adjust state based on current tab

Change-Id: If396829f280fdb7831ade97180c38342e4f483a3
diff --git a/src/com/android/browser/UiController.java b/src/com/android/browser/UiController.java
index 421dc14..10821cd 100644
--- a/src/com/android/browser/UiController.java
+++ b/src/com/android/browser/UiController.java
@@ -16,12 +16,13 @@
 
 package com.android.browser;
 
-import com.android.browser.UI.DropdownChangeListener;
-
 import android.content.Intent;
+import android.view.Menu;
 import android.view.MenuItem;
 import android.webkit.WebView;
 
+import com.android.browser.UI.DropdownChangeListener;
+
 import java.util.List;
 
 
@@ -93,6 +94,8 @@
 
     void unregisterOptionsMenuHandler(OptionsMenuHandler handler);
 
+    void updateMenuState(Tab tab, Menu menu);
+
     void registerDropdownChangeListener(DropdownChangeListener d);
 
     boolean onOptionsItemSelected(MenuItem item);