Additional fix for RT-16364: TextArea: focus is not gained by clicking on empty area

diff -r 222abaf43800 javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextAreaSkin.java
--- a/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextAreaSkin.java	Wed Sep 07 10:53:04 2011 -0700
+++ b/javafx-ui-controls/src/com/sun/javafx/scene/control/skin/TextAreaSkin.java	Wed Sep 07 14:22:10 2011 -0700
@@ -101,7 +101,7 @@
 
             prefWidth += padding.getLeft() + padding.getRight();
 
-            return prefWidth;
+            return Math.max(prefWidth, scrollPane.getViewportBounds().getWidth());
         }
 
         @Override
@@ -131,7 +131,7 @@
 
             prefHeight += padding.getTop() + padding.getBottom();
 
-            return Math.max(prefHeight, scrollPane.getPrefViewportHeight());
+            return Math.max(prefHeight, scrollPane.getViewportBounds().getHeight());
         }
 
         @Override
@@ -260,6 +260,11 @@
                 || scrollPane.getPrefViewportHeight() == 0) {
                 updatePrefViewportWidth();
                 updatePrefViewportHeight();
+                if (getParent() != null && scrollPane.getPrefViewportWidth() > 0
+                                        || scrollPane.getPrefViewportHeight() > 0) {
+                    // Force layout of viewRect in ScrollPaneSkin
+                    getParent().requestLayout();
+                }
             }
         }
     }