Few regression tests are failing with java.lang.Error.

Bug Info
=========
The following tests are failing due to can't load the javax.swing.plaf.metal.MetalLookAndFeel while executing with jdk7 pit b66 and also it fails with older builds.

javax/swing/JFileChooser/6570445/bug6570445.java
javax/swing/JPopupMenu/6675802/bug6675802.java
javax/swing/JFileChooser/6738668/bug6738668.java
closed/javax/swing/Serialization/6466058/bug6466058.java

JDK Info
=========
java version "1.7.0-internal"
Java(TM) SE Runtime Environment (build 1.7.0-internal-administrator_2009_07_14_2
2_30-b00)
Java HotSpot(TM) Client VM (build 16.0-b05, mixed mode)


Exception details
==================
java.lang.Error: Cannot load javax.swing.plaf.metal.MetalLookAndFeel
at javax.swing.UIManager.initializeDefaultLAF(UIManager.java:1347)
at javax.swing.UIManager.initialize(UIManager.java:1434)
at javax.swing.UIManager.maybeInitialize(UIManager.java:1422)
at javax.swing.UIManager.getDefaults(UIManager.java:663)
at javax.swing.UIManager.getString(UIManager.java:792)
at javax.swing.filechooser.UnixFileSystemView.<clinit>(FileSystemView.java:581)
at javax.swing.filechooser.FileSystemView.getFileSystemView(FileSystemView.java:83)
at bug6570445.main(bug6570445.java:16)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:623)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:717)