fix pie menu handling

Change-Id: Iab2bc23c2200799dbb0983b43ef66891bb51215d
diff --git a/src/com/android/browser/PieControl.java b/src/com/android/browser/PieControl.java
index 81a6c1f..684cd1a 100644
--- a/src/com/android/browser/PieControl.java
+++ b/src/com/android/browser/PieControl.java
@@ -107,7 +107,7 @@
             menuview.setLayoutListener(new OnLayoutListener() {
                 @Override
                 public void onLayout(int ax, int ay, boolean left) {
-                    mActivity.openOptionsMenu();
+                    buildMenu();
                 }
             });
 
@@ -146,7 +146,9 @@
 
     }
 
-    protected void onMenuOpened(Menu menu) {
+    private void buildMenu() {
+        Menu menu = mUi.getMenu();
+        menu.setGroupVisible(R.id.NAV_MENU, false);
         mMenuAdapter.setMenu(menu);
     }