Reviewed by Simon Fraser.

        Tests that we do not crash when removing inline style
        from a node that is not a html element.
        https://bugs.webkit.org/show_bug.cgi?id=57348

        * editing/execCommand/remove-format-non-html-element-crash-expected.txt: Added.
        * editing/execCommand/remove-format-non-html-element-crash.html: Added.
2011-03-30  Abhishek Arya  <inferno@chromium.org>

        Reviewed by Simon Fraser.

        Fix wrong type assumptions in editing code. Move code
        from ASSERTs to hard checks.
        https://bugs.webkit.org/show_bug.cgi?id=57348

        Test: editing/execCommand/remove-format-non-html-element-crash.html

        * css/CSSStyleSelector.cpp:
        (WebCore::CSSStyleSelector::applyProperty):
        * editing/ApplyStyleCommand.cpp:
        (WebCore::getRGBAFontColor):
        (WebCore::ApplyStyleCommand::pushDownInlineStyleAroundNode):
        * editing/DeleteButtonController.cpp:
        (WebCore::enclosingDeletableElement):
        * editing/EditingStyle.cpp:
        (WebCore::EditingStyle::textDirection):
        (WebCore::EditingStyle::prepareToApplyAt):
        * editing/Editor.cpp:
        (WebCore::Editor::textDirectionForSelection):
        * editing/FormatBlockCommand.cpp:
        (WebCore::FormatBlockCommand::elementForFormatBlockCommand):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@82503 268f45cc-cd09-0410-ab3c-d52691b4dbfc