Reviewed by Eric Seidel.

        JSC bindings for HasIndexGetter generates incorrect code (affects
        MediaList and CSSStyleDeclaration).
        This cleans up the edge cases for indexing out of range for style and
        computed style objects to return an empty string according to the spec.
        MediaList now returns null when indexed out of range.
        https://bugs.webkit.org/show_bug.cgi?id=31683

        * fast/dom/CSSStyleDeclaration/css-computed-style-item-expected.txt: Added.
        * fast/dom/CSSStyleDeclaration/css-computed-style-item.html: Added.
        * fast/dom/CSSStyleDeclaration/css-style-item-expected.txt: Added.
        * fast/dom/CSSStyleDeclaration/css-style-item.html: Added.
        * fast/dom/CSSStyleDeclaration/script-tests/css-computed-style-item.js: Added.
        * fast/dom/CSSStyleDeclaration/script-tests/css-style-item.js: Added.
        * fast/dom/StyleSheet/css-medialist-item-expected.txt: Added.
        * fast/dom/StyleSheet/css-medialist-item.html: Added.
        * fast/dom/StyleSheet/script-tests/TEMPLATE.html: Copied from LayoutTests/fast/backgrounds/repeat/script-tests/TEMPLATE.html.
        * fast/dom/StyleSheet/script-tests/css-medialist-item.js: Added.
2009-11-23  Erik Arvidsson  <arv@chromium.org>

        Reviewed by Eric Seidel.

        JSC bindings for HasIndexGetter generates incorrect code (affects
        MediaList and CSSStyleDeclaration).
        This cleans up the edge cases for indexing out of range for style and
        computed style objects to return an empty string according to the spec.
        MediaList now returns null when indexed out of range.
        https://bugs.webkit.org/show_bug.cgi?id=31683

        Tests: fast/dom/CSSStyleDeclaration/css-computed-style-item.html
               fast/dom/CSSStyleDeclaration/css-style-item.html
               fast/dom/StyleSheet/css-medialist-item.html

        * bindings/scripts/CodeGeneratorJS.pm: If IndexGetterReturnsString then
                we do not check the length before calling the item function.
        * css/CSSComputedStyleDeclaration.cpp:
        (WebCore::CSSComputedStyleDeclaration::item):
        * css/CSSMutableStyleDeclaration.cpp:
        (WebCore::CSSMutableStyleDeclaration::item):
        * css/CSSStyleDeclaration.idl:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@51326 268f45cc-cd09-0410-ab3c-d52691b4dbfc