Ok, I understood this,

1- Right click on the element

2- Select "Break On..."

3- For this example, check "Node Removal"

4- Click 'delete me' :)

5- Use the call stack to see where the removal comes from.

Useful link: Google IO session about this: http://danesparza.net/2011/06/a-re-introduction-to-the-chrom...