Allow construction of unprefixed transition DOM events.
https://bugs.webkit.org/show_bug.cgi?id=107319

Reviewed by Dean Jackson.

Source/WebCore:

Make possible to construct unprefixed DOM events for transitions.
Unfortunately I have to duplicate the C++ implementation class of the
events (TransitionEvent.h and TransitionEvent.cpp). I can't find a
better way to re-use the WebKitTransitionEvent class to back the
TransitionEvent.idl as our code generators don't allow to have a
different name for the C++ class used in the generated file than the
interface name specified in the IDL file. Unfortunately
https://trac.webkit.org/wiki/WebKitIDL#InterfaceName doesn't help as
it's only a way to unlink the interface name specified in the IDL with
the one exposed in JavaScript. I don't think we should support such a
feature in our code generators as WebKitTransitionEvent class and more
exactly prefixed DOM events for transitions will be removed one day so
this use case will become obselete.

Test: fast/events/constructors/transition-event-constructor.html

* CMakeLists.txt:
* DerivedSources.cpp:
* DerivedSources.make:
* DerivedSources.pri:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* dom/DOMAllInOne.cpp:
* dom/EventNames.in:
* dom/TransitionEvent.cpp: Added.
(WebCore):
(WebCore::TransitionEventInit::TransitionEventInit):
(WebCore::TransitionEvent::TransitionEvent):
(WebCore::TransitionEvent::~TransitionEvent):
(WebCore::TransitionEvent::propertyName):
(WebCore::TransitionEvent::elapsedTime):
(WebCore::TransitionEvent::interfaceName):
* dom/TransitionEvent.h: Added.
(WebCore):
(TransitionEventInit):
(TransitionEvent):
(WebCore::TransitionEvent::create):
* dom/TransitionEvent.idl: Added.
* page/DOMWindow.idl:
* page/animation/AnimationController.cpp:
(WebCore::AnimationControllerPrivate::fireEventsAndUpdateStyle): always
create a TransitionEvent now. EventTarget will be responsible to create
a WebKitTransitionEvent if necessary.

LayoutTests:

Add new tests to cover the feature. Update some existing ones with new
expected results as a new constructor was added.

* fast/dom/constructed-objects-prototypes.html:
* fast/dom/constructed-objects-prototypes-expected.txt:
* fast/events/constructors/transition-event-constructor-expected.txt: Added.
* fast/events/constructors/transition-event-constructor.html: Added.
* fast/events/event-creation.html:
* platform/chromium/TestExpectations: Chromium turns the feature off.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@140448 268f45cc-cd09-0410-ab3c-d52691b4dbfc