Bug 261164 [CommonNavigator] Add dynamic tracing for DnD
The options were put in, but the tracing was never actually hooked up.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonDragAdapter.java
.createTransferData(contentService);
			if (DEBUG) {
				System.out
						.println("CommonDragAdapter.dragSetData set PluginTransfer"); 
			}
		} else if (selection instanceof IStructuredSelection) {
			if (DEBUG) {
				System.out
						.println("CommonDragAdapter.dragSetData looking for assistants"); 
			}
			INavigatorDnDService dndService = contentService.getDnDService();
			CommonDragAdapterAssistant[] assistants = dndService
					.getCommonDragAssistants();
			for (int i = 0; i < assistants.length; i++) {
				Transfer[] supportedTransferTypes = assistants[i]
						.getSupportedTransferTypes();
				for (int j = 0; j < supportedTransferTypes.length; j++) {
					if (supportedTransferTypes[j]
							.isSupportedType(event.dataType)) {
						try {
							if (DEBUG) {
								System.out
										.println("CommonDragAdapter.dragSetData set assistant transfer type"); 
							}
							if(assistants[i].setDragData(event,
									(IStructuredSelection) selection)) {
								return;
							}
						} catch (RuntimeException re) {
							NavigatorPlugin.logError(0, re.getMessage(), re);