https://bugs.webkit.org/show_bug.cgi?id=125243

Patch by Thiago de Barros Lacerda <thiago.lacerda@openbossa.org> on 2013-12-05
Reviewed by Eric Carlson.

Spec states that: In particular, if an RTCPeerConnection object is consuming a MediaStream on which a track is
added, by, e.g., the addTrack() method being invoked, the RTCPeerConnection object must fire the
"negotiationneeded" event. Removal of media components must also trigger "negotiationneeded".

Source/WebCore:

Existing tests updated.

* Modules/mediastream/MediaStream.cpp:
(WebCore::MediaStream::addTrack):
(WebCore::MediaStream::removeTrack):
(WebCore::MediaStream::addObserver):
(WebCore::MediaStream::removeObserver):
* Modules/mediastream/MediaStream.h:
* Modules/mediastream/RTCPeerConnection.cpp:
(WebCore::RTCPeerConnection::~RTCPeerConnection):
(WebCore::RTCPeerConnection::addStream):
(WebCore::RTCPeerConnection::removeStream):
(WebCore::RTCPeerConnection::didAddOrRemoveTrack):
* Modules/mediastream/RTCPeerConnection.h:
* platform/mock/RTCPeerConnectionHandlerMock.cpp:
(WebCore::RTCPeerConnectionHandlerMock::addStream):

LayoutTests:

* fast/mediastream/RTCPeerConnection-AddRemoveStream-expected.txt:
* fast/mediastream/RTCPeerConnection-AddRemoveStream.html:
* fast/mediastream/RTCPeerConnection-onnegotiationneeded-expected.txt:
* fast/mediastream/RTCPeerConnection-onnegotiationneeded.html:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@160181 268f45cc-cd09-0410-ab3c-d52691b4dbfc