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
}
			public void run() throws Exception {
				contentProvider.inputChanged(aViewer, anOldInput, aNewInput);
			}
			
		});
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		return contentProvider.toString();
	}
	/**
	 * 
	 * @return The real content provider.
	 */
	public ITreeContentProvider getDelegateContentProvider() {
		return contentProvider;
	}
	public void restoreState(IMemento aMemento) {
		if (contentProvider != null && contentProvider instanceof IMementoAware) {
			((IMementoAware) contentProvider).restoreState(aMemento);
		}
	}
	public void saveState(IMemento aMemento) {
		if (contentProvider != null && contentProvider instanceof IMementoAware) {
			((IMementoAware) contentProvider).saveState(aMemento);