https://bugs.webkit.org/show_bug.cgi?id=76216

Reviewed by Eric Seidel.

Spec: http://www.w3.org/TR/DOM-Level-3-Events/#events-FocusEvent

This patch creates a new FocusEvent class with a relatedTarget attribute.
Now when focusin or focusout events are dispatched, a FocusEvent is created with
the relatedTarget attribute set accordingly.

Source/WebCore:

Test: fast/events/related-target-focusevent.html

* CMakeLists.txt:
* DerivedSources.cpp:
* DerivedSources.make:
* DerivedSources.pri:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.gypi:
* WebCore.xcodeproj/project.pbxproj:
* dom/DOMAllInOne.cpp:
* dom/Event.cpp:
(WebCore::Event::isFocusEvent):
(WebCore):
* dom/Event.h:
(Event):
* dom/EventContext.cpp:
(WebCore::EventContext::handleLocalEvents):
* dom/EventNames.in:
* dom/FocusEvent.h: Added.
(WebCore):
(FocusEvent):
(WebCore::FocusEvent::create):
(WebCore::FocusEvent::relatedTarget):
(WebCore::FocusEvent::setRelatedTarget):
(WebCore::toFocusEvent):
* dom/FocusEvent.idl: Added.
* dom/Node.cpp:
(WebCore::Node::dispatchFocusInEvent):
(WebCore::Node::dispatchFocusOutEvent):

LayoutTests:

* fast/dom/shadow/shadow-boundary-events-expected.txt:
* fast/dom/shadow/shadow-boundary-events.html:
* fast/events/related-target-focusevent-expected.txt: Added.
* fast/events/related-target-focusevent.html: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@142072 268f45cc-cd09-0410-ab3c-d52691b4dbfc