Bug 139986 [CommonNavigator] Convert catch(Error/Throwable) to SafeRunner
In several places the CN framework uses catch(Error/Throwable) to ensure that code does not bring the framework down. Change these to use SafeRunner.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/internal/navigator/extensions/SafeDelegateTreeContentProvider.java
* @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRemove(org.eclipse.ui.navigator.PipelinedShapeModification)
	 */
	public PipelinedShapeModification interceptRemove(
			PipelinedShapeModification aRemoveModification) { 
		if (contentProvider instanceof IPipelinedTreeContentProvider) {
			return ((IPipelinedTreeContentProvider) contentProvider)
					.interceptRemove(aRemoveModification);
		}
		return aRemoveModification;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptRefresh(org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptRefresh(
			PipelinedViewerUpdate aRefreshSynchronization) {
		if (contentProvider instanceof IPipelinedTreeContentProvider) {
			return ((IPipelinedTreeContentProvider) contentProvider)
					.interceptRefresh(aRefreshSynchronization);
		}
		return false;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.navigator.IPipelinedTreeContentProvider#interceptUpdate(org.eclipse.ui.navigator.PipelinedViewerUpdate)
	 */
	public boolean interceptUpdate(
			PipelinedViewerUpdate anUpdateSynchronization) {