Reviewed by Geoff.

    Reviewed by Geoff.

        Optimize JSCSSStyleDeclaration after performance regression in r21854.

        - Check static table before name getter in JSCSSStyleDeclaration::getOwnPropertySlot()
        - Get rid of a string allocation by keeping string as KJS::Identifier for canGetItemsForName()
          functions.

        * WebCore.xcodeproj/project.pbxproj:
        * bindings/js/JSCSSStyleDeclarationCustom.cpp:
        (WebCore::JSCSSStyleDeclaration::canGetItemsForName):
        * bindings/js/JSHTMLAppletElementCustom.cpp:
        (WebCore::JSHTMLAppletElement::canGetItemsForName):
        * bindings/js/JSHTMLDocumentCustom.cpp:
        (WebCore::JSHTMLDocument::canGetItemsForName):
        * bindings/js/JSHTMLEmbedElementCustom.cpp:
        (WebCore::JSHTMLEmbedElement::canGetItemsForName):
        * bindings/js/JSHTMLFormElementCustom.cpp:
        (WebCore::JSHTMLFormElement::canGetItemsForName):
        * bindings/js/JSHTMLFrameSetElementCustom.cpp:
        (WebCore::JSHTMLFrameSetElement::canGetItemsForName):
        * bindings/js/JSHTMLObjectElementCustom.cpp:
        (WebCore::JSHTMLObjectElement::canGetItemsForName):
        * bindings/scripts/CodeGeneratorJS.pm:
        * css/CSSStyleDeclaration.idl:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@21979 268f45cc-cd09-0410-ab3c-d52691b4dbfc