Bug 29163 SafeRunnable needs to be accessible in JFace
We need to be able to access the SafeRunnable in JFace in order that some error protection can be added to preferences and properties dialogs.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/dialogs/ErrorDialog.java
/* (non-Javadoc)
	 * Method declared on Dialog.
	 * Handles the pressing of the Ok or Details button in this dialog.
	 * If the Ok button was pressed then close this dialog.  If the Details
	 * button was pressed then toggle the displaying of the error details area.
	 * Note that the Details button will only be visible if the error being
	 * displayed specifies child details.
	 */
	protected void buttonPressed(int id) {
		if (id == IDialogConstants.DETAILS_ID) {
			
			toggleDetailsArea();
		} else {
			super.buttonPressed(id);
		}
	}
	/* (non-Javadoc)
	 * Method declared in Window.
	 */
	protected void configureShell(Shell shell) {
		super.configureShell(shell);
		shell.setText(title);
	}
	/* (non-Javadoc)
	 * Method declared on Dialog.
	 */
	protected void createButtonsForButtonBar(Composite parent) {
		
		createButton(
			parent,