Bug 162140 [Progress] Be more resilient to null args in StatusLine's progress monitor
bundles/org.eclipse.jface/src/org/eclipse/jface/action/StatusLine.java
* @private
     */
    protected void hideProgress() {
        if (fProgressIsVisible && !isDisposed()) {
            fProgressIsVisible = false;
            fCancelEnabled = false;
            fCancelButtonIsVisible = false;
            if (fToolBar != null && !fToolBar.isDisposed()) {
				fToolBar.setVisible(false);
			}
            if (fProgressBarComposite != null
                    && !fProgressBarComposite.isDisposed()) {
				fProgressBarComposite.setVisible(false);
			}
            layout();
        }
    }
    /**
     * @see IProgressMonitor#internalWorked(double)
     */
    public void internalWorked(double work) {
        if (!fProgressIsVisible) {
            if (System.currentTimeMillis() - fStartTime > DELAY_PROGRESS) {
				showProgress();
			}
        }
        if (fProgressBar != null) {
            fProgressBar.worked(work);
        }
    }