MediaStream API: Update MediaStreamTrackList to match the specification

MediaStream API: Update MediaStreamTrackList to match the specification
https://bugs.webkit.org/show_bug.cgi?id=90171

Reviewed by Adam Barth.

Source/Platform:

The latest update to the specification added add and remove methods with corresponding callbacks.
The callbacks can be triggered both from JS and from the platform layer.

* chromium/public/WebMediaStreamCenterClient.h:
(WebKit):
(WebMediaStreamCenterClient):

Source/WebCore:

The latest update to the specification added add and remove methods with corresponding callbacks.
The callbacks can be triggered both from JS and from the platform layer.

Test: fast/mediastream/MediaStreamTrackList.html

* CMakeLists.txt:
* GNUmakefile.list.am:
* Modules/mediastream/MediaStream.cpp:
(WebCore::MediaStream::MediaStream):
(WebCore::MediaStream::~MediaStream):
(WebCore::MediaStream::streamEnded):
(WebCore::MediaStream::addTrack):
(WebCore):
(WebCore::MediaStream::removeTrack):
* Modules/mediastream/MediaStream.h:
(MediaStream):
* Modules/mediastream/MediaStreamTrackEvent.cpp: Copied from Source/WebCore/Modules/mediastream/MediaStreamTrackList.cpp.
(WebCore):
(WebCore::MediaStreamTrackEvent::create):
(WebCore::MediaStreamTrackEvent::MediaStreamTrackEvent):
(WebCore::MediaStreamTrackEvent::~MediaStreamTrackEvent):
(WebCore::MediaStreamTrackEvent::track):
(WebCore::MediaStreamTrackEvent::interfaceName):
* Modules/mediastream/MediaStreamTrackEvent.h: Copied from Source/WebCore/Modules/mediastream/MediaStreamTrackList.h.
(WebCore):
(MediaStreamTrackEvent):
* Modules/mediastream/MediaStreamTrackEvent.idl: Copied from Source/WebCore/Modules/mediastream/MediaStreamTrackList.idl.
* Modules/mediastream/MediaStreamTrackList.cpp:
(WebCore::MediaStreamTrackList::create):
(WebCore::MediaStreamTrackList::MediaStreamTrackList):
(WebCore::MediaStreamTrackList::detachOwner):
(WebCore):
(WebCore::MediaStreamTrackList::add):
(WebCore::MediaStreamTrackList::remove):
(WebCore::MediaStreamTrackList::stop):
(WebCore::MediaStreamTrackList::interfaceName):
(WebCore::MediaStreamTrackList::scriptExecutionContext):
(WebCore::MediaStreamTrackList::eventTargetData):
(WebCore::MediaStreamTrackList::ensureEventTargetData):
* Modules/mediastream/MediaStreamTrackList.h:
(MediaStreamTrackList):
* Modules/mediastream/MediaStreamTrackList.idl:
* WebCore.gypi:
* dom/EventNames.h:
(WebCore):
* dom/EventNames.in:
* dom/EventTargetFactory.in:
* platform/mediastream/MediaStreamCenter.cpp:
(WebCore::MediaStreamCenter::addMediaStreamTrack):
(WebCore):
(WebCore::MediaStreamCenter::removeMediaStreamTrack):
* platform/mediastream/MediaStreamCenter.h:
(MediaStreamCenter):
* platform/mediastream/MediaStreamDescriptor.h:
(MediaStreamDescriptorOwner):
* platform/mediastream/chromium/MediaStreamCenterChromium.cpp:
(WebCore::MediaStreamCenterChromium::didAddMediaStreamTrack):
(WebCore):
(WebCore::MediaStreamCenterChromium::didRemoveMediaStreamTrack):
(WebCore::MediaStreamCenterChromium::addMediaStreamTrack):
(WebCore::MediaStreamCenterChromium::removeMediaStreamTrack):
* platform/mediastream/chromium/MediaStreamCenterChromium.h:
(WebKit):
(MediaStreamCenterChromium):
* platform/mediastream/gstreamer/MediaStreamCenterGStreamer.cpp:
(WebCore::MediaStreamCenterGStreamer::didAddMediaStreamTrack):
(WebCore):
(WebCore::MediaStreamCenterGStreamer::didRemoveMediaStreamTrack):
* platform/mediastream/gstreamer/MediaStreamCenterGStreamer.h:
(MediaStreamCenterGStreamer):

LayoutTests:

* fast/mediastream/MediaStreamTrackList-expected.txt: Added.
* fast/mediastream/MediaStreamTrackList.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121691 268f45cc-cd09-0410-ab3c-d52691b4dbfc