[GStreamer] the webkitwebsrc element can stale
https://bugs.webkit.org/show_bug.cgi?id=138425

Patch by Xavier Claessens <xavier.claessens@collabora.com> on 2014-12-15
Reviewed by Philippe Normand.

* platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp:
(removeTimeoutSources):
(webKitWebSrcStart):
(webKitWebSrcChangeState):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@177279 268f45cc-cd09-0410-ab3c-d52691b4dbfc