Unreviewed, rolling out r176905.
https://bugs.webkit.org/show_bug.cgi?id=139337

the test case is failing in bots (Requested by anttik on
#webkit).

Reverted changeset:

"REGRESSION (173394): Support for webcam is broken"
https://bugs.webkit.org/show_bug.cgi?id=139313
http://trac.webkit.org/changeset/176905

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@176906 268f45cc-cd09-0410-ab3c-d52691b4dbfc