[Blink] Problem with textarea in paragraph

[Marek Lewandowski]

master

1. open any sample with CKEditor (i.e. samples/replacebyclass.html)
2. use following source code:

   <p>&nbsp;</p>
   
   <p><textarea name="foo"></textarea></p>
   
   <p><textarea name="foo"></textarea></p>
   
   <p>&nbsp;</p>
   

3. go back to wysiwyg mode, and put cursor in first line
4. press down arrow

Important note:
With firefox even more weird things happen, we are able to place cursor inside textarea, and some exception like:

Error: Permission denied to access property 'nodeType' @ http://presets.ckeditor.dev/4.3.1/full-all/ckeditor/ckeditor.js:353

Are thrown, however it has already been that way at least since 4.3 (#11262).

Expected result:
Caret should move to paragraph with textarea

Current result:
Caret skips paragraph with textarea, and moves to last line

additional info:

1. confirmed in chrome @ win8
2. it was even reproducable when i placed 2 textareas in paragraph
3. my assumption is that it's related to #11042 but it's only my gutts tell

[Jakub Ś]

I was able to reproduce this problem only in Blink from CKE 4.3