Blocked painting of selection for inline inputbox

Blocked painting of selection for inline inputbox

[Title] Blocked painting of selection for inline inputbox
[Issue#] N/A
[Problem] Select content and extend it to input box when
     the IME is not up (input node not focused) and the
     copy the text. Text inside the input box is not copied
     but painted for selection
[Cause] The input box content is in shadow root. So this
     content is not selected. But while painting there is
     such condition. All the contents are getting painted
[Solution] Checking if the content is in shadow root then
     do not paint the selection as it is not selected in the
     dom selection

Change-Id: Ieaf87576d9ec961016982a7c0a1dd1c003315bb3