Reviewed by Mitz.

        - test for http://bugs.webkit.org/show_bug.cgi?id=7452
          <rdar://problem/3211749> line breaks ignored after <wbr> in <pre> block (affects livejournal.com)

        * fast/text/wbr-pre-expected.checksum: Added.
        * fast/text/wbr-pre-expected.png: Added.
        * fast/text/wbr-pre-expected.txt: Added.
        * fast/text/wbr-pre.html: Added.

        - test for http://bugs.webkit.org/show_bug.cgi?id=10657
          <rdar://problem/4274588> <wbr> tags are ignored

        * fast/text/wbr-expected.checksum: Added.
        * fast/text/wbr-expected.png: Added.
        * fast/text/wbr-expected.txt: Added.
        * fast/text/wbr.html: Added.

        - test for http://bugs.webkit.org/show_bug.cgi?id=12689
          <wbr> :before/:after content causes line break

        * fast/css-generated-content/wbr-with-before-content-expected.checksum: Added.
        * fast/css-generated-content/wbr-with-before-content-expected.png: Added.
        * fast/css-generated-content/wbr-with-before-content-expected.txt: Added.
        * fast/css-generated-content/wbr-with-before-content.html: Added.

        - test for <rdar://problem/5127366> DOM tree isn't correct when parsing with <wbr>

        * fast/invalid/021-expected.txt: Updated result.
        * fast/parser/parse-wbr-expected.txt: Added.
        * fast/parser/parse-wbr.html: Added.

WebCore:

        Reviewed by Mitz.

        - fix http://bugs.webkit.org/show_bug.cgi?id=7452
          <rdar://problem/3211749> line breaks ignored after <wbr> in <pre> block (affects livejournal.com)

        - fix http://bugs.webkit.org/show_bug.cgi?id=10657
          <rdar://problem/4274588> <wbr> tags are ignored

        - fix http://bugs.webkit.org/show_bug.cgi?id=12689
          <wbr> :before/:after content causes line break

        - fix <rdar://problem/5127366> DOM tree isn't correct when parsing with <wbr>

        Test: fast/text/wbr-pre.html
        Test: fast/text/wbr.html
        Test: fast/css-generated-content/wbr-with-before-content.html
        Test: fast/parser/parse-wbr.html

        * html/HTMLElement.h:
        * html/HTMLElement.cpp:
        (WebCore::HTMLElement::endTagRequirement): Use the same end tag requirement for a <wbr>
        element as for a <br> element, TagStatusForbidden.
        (WebCore::HTMLElement::tagPriority): Use the same priority for a <wbr> element as for a
        <br> element, 0.
        (WebCore::HTMLElement::createRenderer): Added. Create a RenderWordBreak to trigger the
        new rendering code paths.

        * rendering/RenderFlow.h: Add a virtual isWordBreak so we can detect RenderWordBreak.

        * rendering/RenderWordBreak.h: Added.
        * rendering/RenderWordBreak.cpp: Added.

        * WebCore.pro: Added new files.
        * WebCore.xcodeproj/project.pbxproj: Added new files.
        * WebCoreSources.bkl: Added new files.

        * rendering/RenderBlock.cpp: (WebCore::RenderBlock::calcInlinePrefWidths): Reset the
        line when we hit a <wbr>.
        * rendering/bidi.cpp: (WebCore::RenderBlock::findNextLineBreak): Add a line break when
        we hit a <wbr>.

        * dom/Node.cpp: (Node::createRendererIfNeeded): Fix a null check for the case where
        createRenderer returns 0 even though rendererIsNeeded returned true. I can't reproduce
        it on demand, but while running layout tests I hit this once. Since there was already
        a null check here, I rearranged it so it guards all the code that uses the renderer.
        Later we might want to figure out under exactly what circumstances rendererIsNeeded
        will return true but createRenderer return 0 and consider eliminating them.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@21405 268f45cc-cd09-0410-ab3c-d52691b4dbfc