use system menu

    On phones with hardware menu key, use the framework's
    menu
    Also fixes:
    Bug: 5051899
    remove overflow button from bar if menu key is present
    Nav options are not visible on tab switcher

Change-Id: I5b55934a392a76f9d9ef16e3bf5c71f27b88d69a
diff --git a/src/com/android/browser/UI.java b/src/com/android/browser/UI.java
index 4b58872..23897f7 100644
--- a/src/com/android/browser/UI.java
+++ b/src/com/android/browser/UI.java
@@ -22,6 +22,7 @@
 import android.view.ActionMode;
 import android.view.KeyEvent;
 import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.webkit.WebChromeClient.CustomViewCallback;
 import android.webkit.WebView;
@@ -102,6 +103,8 @@
 
     public void onExtendedMenuOpened();
 
+    public boolean onOptionsItemSelected(MenuItem item);
+
     public void onOptionsMenuClosed(boolean inLoad);
 
     public void onExtendedMenuClosed(boolean inLoad);