WebCore:

WebCore:

        Reviewed by Oliver Hunt.

        - fix ASSERTION FAILED: !HashTranslator::equal(KeyTraits::emptyValue(), key) when a class attribute is all-whitespace

        Test: fast/dom/class-all-whitespace.html

        * dom/StyledElement.cpp:
        (WebCore::StyledElement::parseMappedAttribute): Check if there is any
        non-whitespace character in the class attribute.

LayoutTests:

        Reviewed by Oliver Hunt.

        - test that an all-whitespace class attribute does not cause an assertion failure

        * fast/dom/class-all-whitespace-expected.txt: Added.
        * fast/dom/class-all-whitespace.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@27441 268f45cc-cd09-0410-ab3c-d52691b4dbfc