Reviewed by Darin.

    Reviewed by Darin.

	<rdar://problem/3482935> JavaScript so slow it seems like a hang (hrweb.apple.com) (HTMLCollection?)
	<rdar://problem/3759149> PeopleSoft page in Safari twice as slow as Mozilla engine (HTMLFormCollection)
	<rdar://problem/3888368> selecting an item on the Apache bugzilla query page can be improved 95% (HTMLFormCollection)

	Many optimizations to HTMLFormCollection. Iterating it should not
	be N^2 any more, though finding items by name could still be.

        * khtml/html/html_formimpl.cpp:
        (DOM::HTMLFormElementImpl::~HTMLFormElementImpl):
        (DOM::HTMLFormElementImpl::length):
        (DOM::HTMLFormElementImpl::submitClick):
        (DOM::HTMLFormElementImpl::formData):
        (DOM::HTMLFormElementImpl::submit):
        (DOM::HTMLFormElementImpl::reset):
        (DOM::HTMLFormElementImpl::radioClicked):
        (DOM::appendToVector):
        (DOM::removeFromVector):
        (DOM::HTMLFormElementImpl::registerFormElement):
        (DOM::HTMLFormElementImpl::removeFormElement):
        (DOM::HTMLFormElementImpl::makeFormElementDormant):
        (DOM::HTMLFormElementImpl::registerImgElement):
        (DOM::HTMLFormElementImpl::removeImgElement):
        * khtml/html/html_formimpl.h:
        * khtml/html/html_miscimpl.cpp:
        (HTMLFormCollectionImpl::FormCollectionInfo::FormCollectionInfo):
        (void::HTMLFormCollectionImpl::FormCollectionInfo::reset):
        (HTMLFormCollectionImpl::resetCollectionInfo):
        (HTMLFormCollectionImpl::calcLength):
        (HTMLFormCollectionImpl::item):
        (HTMLFormCollectionImpl::getNamedItem):
        (HTMLFormCollectionImpl::getNamedFormItem):
        (HTMLFormCollectionImpl::firstItem):
        (HTMLFormCollectionImpl::nextItem):
        * khtml/html/html_miscimpl.h:
        (DOM::HTMLFormCollectionImpl::~HTMLFormCollectionImpl):
        * khtml/xml/dom_elementimpl.cpp:
        (ElementImpl::setAttribute):
        (ElementImpl::setAttributeMap):
        * kwq/KWQPtrVector.h:
        (QPtrVector::findRef):
        * kwq/KWQVectorImpl.h:
        * kwq/KWQVectorImpl.mm:
        (KWQVectorImpl::findRef):
        * kwq/WebCoreBridge.mm:
        (-[WebCoreBridge elementWithName:inForm:]):
        (-[WebCoreBridge controlsInForm:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8057 268f45cc-cd09-0410-ab3c-d52691b4dbfc