         // If the hostComponent is in overlay mode, the contentGroup extends
         // the entire bounds of the navigator and the alpha for the action 
         // bar changes
+        // If this changes, also update validateEstimatedSizesOfChild
         if (currentState == "portraitAndOverlay" || currentState == "landscapeAndOverlay")
         {
             // FIXME (chiedozi): Update when XD spec is written

        var actionBarHeight:Number = 0;
        
        // The action bar is always placed at 0,0 and stretches the entire
        // width of the navigator
        if (actionBar.includeInLayout)
        {
            actionBarHeight = Math.min(actionBar.getPreferredBoundsHeight(), unscaledHeight);


package spark.skins.mobile
{
import mx.core.IContainerInvalidating;
import mx.core.ILayoutElement;
import mx.core.mx_internal;
import mx.effects.IEffect;
import mx.states.State;
import mx.states.Transition;
import mx.managers.ILayoutManagerContainerClient;
use namespace mx_internal;

import spark.components.ActionBar;
import spark.components.ButtonBar;
