Swing's regression test fails

test/javax/swing/DataTransfer/DnDAutoTests/Text/TextAutoTest.java

The cause of the failures is following.

This is a regression introduced by the changes for 6824169 (Need to remove some AWT class dependencies) fixed in 6u14 b05.

The fix for 6824169 replaces usages of the reflection API in the javax.swing.TransferHandler class with usages of the sun.swing.SwingAccessor$JComponentAccessor interface - the usages are the JTextComponent.dropLocationForPoint and JTextComponent.setDropLocation calls.

The methods in the JTextComponent class are meant to override appropriate methods in the JComponent class. But these methods in the JComponent class are package-private and the JTextComponent class don't override the methods (the location of the JTextComponent class is javax.swing.text package, not javax.swing package) and it's wrong to call the methods in the JTextComponent class using the SwingAccessor$JComponentAccessor interface.

The fix for the problem is to introduce new sun.swing.SwingAccessor$JTextComponentAccessor interface and access the methods in the JTextComponent class using the interface.