Chrome crashes if right clicking on mapped image

[Alfonso Martínez de Lizarrondo]

Set allowed content to true and then insert an image map in the content:

<img alt="" src="assets/sample.jpg" usemap="#imgmap201414175321zz" />
<map id="imgmap201414175321zz" name="imgmap201414175321zz"><area coords="5,5,155,195" href="page.html" shape="rect" /></map>

Now right click on the map with the developer tools open and the tab will crash in Chromium. Adding a check in the tabletools plugin seems to be enough:

From

editor.contextMenu.addListener( function( element, selection, path ) {
	var cell = path.contains( { 'td': 1, 'th': 1 }, 1 );
	if ( cell && !cell.isReadOnly() ) {

To

editor.contextMenu.addListener( function( element, selection, path ) {
	var cell = path && path.contains( { 'td': 1, 'th': 1 }, 1 );
	if ( cell && !cell.isReadOnly() ) {

Despite this patch, I've already filed a ticket in Chromium, but this patch will avoid getting the error. ​https://code.google.com/p/chromium/issues/detail?id=331664