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/wizard/ProgressMonitorPart.java
if (progressIndicatorHeight == SWT.DEFAULT) {
			GC gc= new GC(fLabel);
			FontMetrics fm= gc.getFontMetrics();
			gc.dispose();
			progressIndicatorHeight= fm.getHeight();
		}
		
		fProgressIndicator= new ProgressIndicator(this);
		GridData gd= new GridData();
		gd.horizontalAlignment= GridData.FILL;
		gd.grabExcessHorizontalSpace= true;
		gd.verticalAlignment= GridData.CENTER;
		gd.heightHint= progressIndicatorHeight;
		fProgressIndicator.setLayoutData(gd);
	}
	/**
	 * Implements <code>IProgressMonitor.internalWorked</code>.
	 * @see IProgressMonitor#internalWorked(double)
	 */
	public void internalWorked(double work) {
		fProgressIndicator.worked(work);
	}
	/**
	 * Implements <code>IProgressMonitor.isCanceled</code>.
	 * @see IProgressMonitor#isCanceled()
	 */
	public boolean isCanceled() {
		return fIsCanceled;
	}