Bug 90528 Editor icon does not show problem decoration for second instance
3.1 M6 - open a .java file that has errors or warnings - the editor tab icon has the problem decoration - Window > New Window - open the same file in the new window - the editor tab icon is missing the problem decoration
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
* <p>
	 * TODO remove once the underlying problem (https://bugs.eclipse.org/bugs/show_bug.cgi?id=66176) is solved.
	 * </p>
	 * @return the lock reconcilers may use to synchronize on
	 */
	public Object getReconcilerLock() {
		return fReconcilerLock;
	}
	
	
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.JavaEditor#createNavigationActions()
	 */
	protected void createNavigationActions() {
		super.createNavigationActions();
		
		final StyledText textWidget= getSourceViewer().getTextWidget();
		IAction action= new DeletePreviousSubWordAction();
		action.setActionDefinitionId(ITextEditorActionDefinitionIds.DELETE_PREVIOUS_WORD);
		setAction(ITextEditorActionDefinitionIds.DELETE_PREVIOUS_WORD, action);
		textWidget.setKeyBinding(SWT.CTRL | SWT.BS, SWT.NULL);
		markAsStateDependentAction(ITextEditorActionDefinitionIds.DELETE_PREVIOUS_WORD, true);
		action= new DeleteNextSubWordAction();
		action.setActionDefinitionId(ITextEditorActionDefinitionIds.DELETE_NEXT_WORD);
		setAction(ITextEditorActionDefinitionIds.DELETE_NEXT_WORD, action);
		textWidget.setKeyBinding(SWT.CTRL | SWT.DEL, SWT.NULL);
		markAsStateDependentAction(ITextEditorActionDefinitionIds.DELETE_NEXT_WORD, true);
	}
}