Reviewed by Darin Adler.

        - fix a bug where CSS rules with :hover in the ancestor chain stopped
          working after changing the inline style declaration of the ancestor

        Test: fast/css/affected-by-hover-after-style-change.html

        * dom/Element.cpp:
        (WebCore::Element::recalcStyle): If we are not forcing style
        recalculation for all descendants, preserve any "affected by
        {hover|active|drag} bits that we may have acquired from them.
        Also renamed _style to currentStyle.

WebKitSite:

        Reviewed by Darin Adler.

        - removed a workaround for the bug fixed in the WebCore part of this
          patch

        * misc/DatabaseExample.html:

LayoutTests:

        Reviewed by Darin Adler.

        - test that CSS rules with :hover in the ancestor chain continue to work
          after changing the inline style declaration of the ancestor

        * fast/css/affected-by-hover-after-style-change.html: Added.
        * platform/mac/fast/css/affected-by-hover-after-style-change-expected.checksum: Added.
        * platform/mac/fast/css/affected-by-hover-after-style-change-expected.png: Added.
        * platform/mac/fast/css/affected-by-hover-after-style-change-expected.txt: Added.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@27576 268f45cc-cd09-0410-ab3c-d52691b4dbfc