Rename rareSVGData() to svgRareData()

Rename rareSVGData() to svgRareData()
https://bugs.webkit.org/show_bug.cgi?id=90051

Reviewed by Nikolas Zimmermann.

Since rareSVGData() returns SVGRareData, it would make sense to
rename rareSVGData() to svgRareData(). Similarly, we can rename
ensureRareSVGData() to ensureSVGRareData(), and hasRareSVGData()
to hasSVGRareData().

c.f. bug 90050 is trying to introduce elementRareData() and
ensureElementRareData().

No tests. No change in behavior.

* WebCore.order:
* dom/Node.h:
(WebCore::Node::hasSVGRareData):
(WebCore::Node::setHasSVGRareData):
(WebCore::Node::clearHasSVGRareData):
* svg/SVGElement.cpp:
(WebCore::SVGElement::~SVGElement):
(WebCore::SVGElement::willRecalcStyle):
(WebCore::SVGElement::svgRareData):
(WebCore::SVGElement::ensureSVGRareData):
(WebCore::SVGElement::mapInstanceToElement):
(WebCore::SVGElement::removeInstanceMapping):
(WebCore::SVGElement::instancesForElement):
(WebCore::SVGElement::setCursorElement):
(WebCore::SVGElement::cursorElementRemoved):
(WebCore::SVGElement::setCursorImageValue):
(WebCore::SVGElement::cursorImageValueRemoved):
(WebCore::SVGElement::correspondingElement):
(WebCore::SVGElement::setCorrespondingElement):
(WebCore::SVGElement::animatedSMILStyleProperties):
(WebCore::SVGElement::ensureAnimatedSMILStyleProperties):
(WebCore::SVGElement::setUseOverrideComputedStyle):
(WebCore::SVGElement::computedStyle):
* svg/SVGElement.h:
(SVGElement):
* svg/SVGStyledElement.cpp:
(WebCore::SVGStyledElement::instanceUpdatesBlocked):
(WebCore::SVGStyledElement::setInstanceUpdatesBlocked):
(WebCore::SVGStyledElement::hasPendingResources):
(WebCore::SVGStyledElement::setHasPendingResources):
(WebCore::SVGStyledElement::clearHasPendingResourcesIfPossible):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121330 268f45cc-cd09-0410-ab3c-d52691b4dbfc