Submitted by: eseidel
Reviewed by: mjs
        DOMString/DOMStringImpl/AtomicString need enhancements before replacing QString
        http://bugzilla.opendarwin.org/show_bug.cgi?id=6228
        Added find(), contains(), startsWith() and endsWith() to DOMString
        Uses the above functions throughout the code.
        Small performance boost.

        * khtml/css/css_base.cpp:
        (CSSSelector::print):
        * khtml/css/css_ruleimpl.cpp:
        (DOM::CSSImportRuleImpl::init):
        * khtml/css/css_valueimpl.cpp:
        (DOM::CSSStyleDeclarationImpl::setProperty):
        * khtml/css/cssparser.cpp:
        (CSSParser::parseValue):
        (CSSParser::parseDeclaration):
        (CSSParser::parseContent):
        * khtml/css/cssstyleselector.cpp:
        (khtml::CSSStyleSelector::CSSStyleSelector):
        (khtml::CSSStyleSelector::setEncodedURL):
        (khtml::parseUASheet):
        (khtml::cleanpath):
        (khtml::CSSStyleSelector::checkSelector):
        (khtml::CSSStyleSelector::checkOneSelector):
        (khtml::CSSRuleSet::addRulesFromSheet):
        (khtml::CSSStyleSelector::applyProperty):
        * khtml/dom/dom_string.cpp:
        * khtml/dom/dom_string.h:
        (DOM::DOMString::contains):
        (DOM::DOMString::find):
        (DOM::DOMString::startsWith):
        (DOM::DOMString::endsWith):
        * khtml/html/html_formimpl.cpp:
        (DOM::HTMLFormElementImpl::parseEnctype):
        * khtml/khtml_part.cpp:
        (KHTMLPart::requestFrame):
        (KHTMLPart::submitForm):
        * khtml/misc/decoder.cpp:
        (Decoder::decode):
        * khtml/xml/dom_atomicstring.h:
        (DOM::AtomicString::length):
        (DOM::AtomicString::operator []):
        (DOM::AtomicString::contains):
        (DOM::AtomicString::find):
        (DOM::AtomicString::startsWith):
        (DOM::AtomicString::endsWith):
        * khtml/xml/dom_docimpl.cpp:
        (DocumentImpl::processHttpEquiv):
        * khtml/xml/dom_stringimpl.cpp:
        (DOM::equal):
        (DOM::equalCaseInsensitive):
        (DOM::DOMStringImpl::find):
        (DOM::DOMStringImpl::endsWith):
        * khtml/xml/dom_stringimpl.h:
        (DOM::DOMStringImpl::startsWith):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@11816 268f45cc-cd09-0410-ab3c-d52691b4dbfc