Adding id attribute test for MediaStream
https://bugs.webkit.org/show_bug.cgi?id=111526

Reviewed by Kentaro Hara.

Spec: http://dev.w3.org/2011/webrtc/editor/getusermedia.html#widl-MediaStream-id
The id strings must only use characters in the ranges U+0021, U+0023 to U+0027,
U+002A to U+002B, U+002D to U+002E, U+0030 to U+0039, U+0041 to U+005A,
U+005E to U+007E, and must be 36 characters long.

* fast/mediastream/MediaStreamConstructor-expected.txt:
* fast/mediastream/MediaStreamConstructor.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@145153 268f45cc-cd09-0410-ab3c-d52691b4dbfc