Reviewed by Darin Adler.

        further fixes towards REGRESSION (r57292): 1% PLT regression from visited link information leak fix
        https://bugs.webkit.org/show_bug.cgi?id=38682
        <rdar://problem/7859794>

        Looks like a 1-2% speedup on PLT.

        - Reorder CSS properties.
        - Remove short circuit tag check in matchRulesForList which costs more than it saves.
        - Inline initForStyleResolve.
        - Optimize applyDeclarations to avoid switch and take fewer branches in the inner loop.
        
        - Change the way Node handles flags - replace bitfield with a uint32_t and explicit masking, 
        to make it cheaper to initialize the bits and give faster access.
        - Added new Node flags to check for isStyledElement, isHTMLElement, isSVGElement, isComment, 
        and devirtualize those methods.
        - Inline constructors for Node, Element, Text, CharacterData, StyledElement, etc since
        they are very simple and lots of nodes get constructed.
        
        * css/CSSPropertyNames.in: Move a few of the properties up front so we can check for them
        with < instead of switch statements
        * css/CSSStyleSelector.cpp:
        (WebCore::CSSStyleSelector::matchRulesForList): Remove unnecessary preflight check
        for tag match before checking selector. This check very rarely short circuits anything,
        since most rules with a tag end up in the appropriate tag bucket. So doing the check
        cost more time than the time saved.
        (WebCore::CSSStyleSelector::initForStyleResolve): Inline. Create RenderStyle in a better way.
        (WebCore::CSSStyleSelector::applyDeclarations): Get rid of switch statement and use <= to
        check for the high priority properties. Convert to template to avoid checking "applyFirst"
        each time through the loop.
        (WebCore::CSSStyleSelector::styleForElement): Adjust for new applyDeclarations() signature.
        (WebCore::CSSStyleSelector::keyframeStylesForAnimation): ditto
        (WebCore::CSSStyleSelector::pseudoStyleForElement): ditto
        * css/CSSStyleSelector.h: Adjust for new applyDeclarations() signature.
        * rendering/style/RenderStyle.cpp:
        (WebCore::RenderStyle::RenderStyle): Inline constructor.
        * rendering/style/RenderStyle.h: Make constructor private so it can be inline.
        * dom/Node.h:
        (WebCore::): See high-level description of changes above. Redid the
        way boolean flags work.
        (WebCore::Node::isElementNode):
        (WebCore::Node::isContainerNode):
        (WebCore::Node::isTextNode):
        (WebCore::Node::isHTMLElement):
        (WebCore::Node::isSVGElement):
        (WebCore::Node::isStyledElement):
        (WebCore::Node::isCommentNode):
        (WebCore::Node::hasID):
        (WebCore::Node::hasClass):
        (WebCore::Node::active):
        (WebCore::Node::inActiveChain):
        (WebCore::Node::inDetach):
        (WebCore::Node::hovered):
        (WebCore::Node::attached):
        (WebCore::Node::setAttached):
        (WebCore::Node::needsStyleRecalc):
        (WebCore::Node::styleChangeType):
        (WebCore::Node::childNeedsStyleRecalc):
        (WebCore::Node::isLink):
        (WebCore::Node::setHasID):
        (WebCore::Node::setHasClass):
        (WebCore::Node::setChildNeedsStyleRecalc):
        (WebCore::Node::clearChildNeedsStyleRecalc):
        (WebCore::Node::setInDocument):
        (WebCore::Node::clearInDocument):
        (WebCore::Node::setInActiveChain):
        (WebCore::Node::clearInActiveChain):
        (WebCore::Node::setIsLink):
        (WebCore::Node::clearIsLink):
        (WebCore::Node::setActive):
        (WebCore::Node::setHovered):
        (WebCore::Node::inDocument):
        (WebCore::Node::):
        (WebCore::Node::getFlag):
        (WebCore::Node::setFlag):
        (WebCore::Node::clearFlag):
        (WebCore::Node::hasRareData):
        (WebCore::Node::isParsingChildrenFinished):
        (WebCore::Node::setIsParsingChildrenFinished):
        (WebCore::Node::clearIsParsingChildrenFinished):
        (WebCore::Node::isStyleAttributeValid):
        (WebCore::Node::setIsStyleAttributeValid):
        (WebCore::Node::clearIsStyleAttributeValid):
        (WebCore::Node::isSynchronizingStyleAttribute):
        (WebCore::Node::setIsSynchronizingStyleAttribute):
        (WebCore::Node::clearIsSynchronizingStyleAttribute):
        (WebCore::Node::areSVGAttributesValid):
        (WebCore::Node::setAreSVGAttributesValid):
        (WebCore::Node::clearAreSVGAttributesValid):
        (WebCore::Node::isSynchronizingSVGAttributes):
        (WebCore::Node::setIsSynchronizingSVGAttributes):
        (WebCore::Node::clearIsSynchronizingSVGAttributes):
        (WebCore::Node::hasRareSVGData):
        (WebCore::Node::setHasRareSVGData):
        (WebCore::Node::clearHasRareSVGData):
        (WebCore::Node::initialRefCount):
        * dom/Node.cpp:
        (WebCore::Node::trackForDebugging): Adjusted for changes in
        flag handling.
        (WebCore::Node::ensureRareData): ditto
        (WebCore::Node::setStyleChange): ditto
        (WebCore::Node::setNeedsStyleRecalc): ditto
        (WebCore::Node::lazyAttach): ditto
        (WebCore::Node::attach): ditto
        (WebCore::Node::detach): ditto
        (WebCore::Node::insertedIntoDocument): ditto
        (WebCore::Node::removedFromDocument): ditto
        * dom/CharacterData.cpp:
        * dom/CharacterData.h:
        (WebCore::CharacterData::CharacterData): Inline the constructor (moved from .cpp)
        * dom/Comment.cpp:
        (WebCore::Comment::Comment): Tell the base class that we're a comment.
        * dom/Comment.h: Remove isCommentNode override.
        * dom/ContainerNode.cpp:
        (WebCore::ContainerNode::detach): Adjusted for changes in flag
        handling.
        (WebCore::ContainerNode::removedFromDocument): ditto
        * dom/Document.cpp:
        (WebCore::Document::Document): Adjusted for changes in flag handling.
        (WebCore::Document::recalcStyle): ditto
        (WebCore::Document::setFocusedNode): ditto
        * dom/Document.h:
        (WebCore::Node::Node): Inline the Node constructor - goes here
        because it uses Document.
        * dom/DocumentFragment.cpp: include Document.h due to above change
        * dom/EditingText.cpp: ditto
        * dom/EntityReference.cpp: ditto
        * dom/Element.cpp:
        (WebCore::Element::getAttribute): Adjusted for changes in flag
        handling.
        (WebCore::Element::setAttribute): ditto
        (WebCore::Element::hasAttributes): ditto
        (WebCore::Element::recalcStyle): ditto
        (WebCore::Element::finishParsingChildren): ditto
        * dom/Element.h:
        (WebCore::Element::Element): Inline (moved from .cpp)
        (WebCore::Element::isFinishedParsingChildren):
        (WebCore::Element::beginParsingChildren):
        (WebCore::Element::attributes): Adjusted for changes in flag
        handling.
        * dom/StyledElement.cpp:
        (WebCore::StyledElement::updateStyleAttribute): Adjust for
        changes to flag handling.
        (WebCore::StyledElement::mapToEntry): ditto
        (WebCore::StyledElement::parseMappedAttribute): ditto
        (WebCore::StyledElement::copyNonAttributeProperties): ditto
        * dom/StyledElement.h:
        (WebCore::StyledElement::StyledElement): Inline (moved from.cpp)
        (WebCore::StyledElement::invalidateStyleAttribute): Adjust for
        changes in flag handling.
        * dom/Text.h:
        (WebCore::Text::Text): Inline (moved from .cpp)
        * dom/Text.cpp:
        * html/HTMLAnchorElement.cpp:
        (WebCore::HTMLAnchorElement::HTMLAnchorElement): Adjust for changes in
        flag handling.
        (WebCore::HTMLAnchorElement::parseMappedAttribute): ditto
        * html/HTMLElement.cpp:
        (WebCore::HTMLElement::create): Tell base class we're an HTML element.
        * html/HTMLElement.h: ditto above; remove isHTMLElement override.
        * html/HTMLFormControlElement.h: Tell base class we're an HTML element.
        * html/HTMLFrameOwnerElement.cpp:
        (WebCore::HTMLFrameOwnerElement::HTMLFrameOwnerElement): ditto
        * html/HTMLProgressElement.cpp:
        (WebCore::HTMLProgressElement::HTMLProgressElement): ditto
        * mathml/MathMLElement.cpp:
        (WebCore::MathMLElement::MathMLElement): Tell base class we're a styled
        element.
        * rendering/MediaControlElements.cpp:
        (WebCore::MediaControlShadowRootElement::MediaControlShadowRootElement):
        Adjust for changes in flag handling.
        (WebCore::MediaControlElement::MediaControlElement): ditto
        (WebCore::MediaControlInputElement::MediaControlInputElement): ditto
        * rendering/RenderFileUploadControl.cpp:
        (WebCore::RenderFileUploadControl::updateFromElement): ditto
        * rendering/RenderLayer.cpp:
        (WebCore::RenderLayer::updateHoverActiveState): ditto
        * rendering/RenderProgress.cpp:
        (WebCore::RenderProgress::updateValuePartState): ditto
        * rendering/RenderSlider.cpp:
        (WebCore::RenderSlider::updateFromElement): ditto
        * rendering/SVGShadowTreeElements.cpp:
        (WebCore::SVGShadowTreeRootElement::SVGShadowTreeRootElement): ditto
        * rendering/TextControlInnerElements.cpp:
        (WebCore::TextControlInnerElement::attachInnerElement): ditto
        * svg/SVGAnimatedProperty.h:
        (WebCore::SVGAnimatedPropertyTearOff::setBaseVal): ditto
        (WebCore::SVGAnimatedPropertyTearOff::setAnimVal): ditto
        * svg/SVGElement.cpp:
        (WebCore::SVGElement::SVGElement): Tell base class we're
        an svg element.
        (WebCore::SVGElement::ensureRareSVGData): Adjust for flag handling
        changes.
        (WebCore::SVGElement::updateAnimatedSVGAttribute): ditto
        * svg/SVGElement.h:
        (WebCore::SVGElement::invalidateSVGAttributes): ditto
        * svg/SVGPolyElement.cpp:
        (WebCore::SVGPolyElement::svgAttributeChanged): ditto
        * wml/WMLAnchorElement.cpp:
        (WebCore::WMLAnchorElement::WMLAnchorElement): ditto
        * wml/WMLElement.cpp:
        (WebCore::WMLElement::WMLElement): Tell base class we're a styled
        element.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58914 268f45cc-cd09-0410-ab3c-d52691b4dbfc