Reviewed by Dan Bernstein.

        https://bugs.webkit.org/show_bug.cgi?id=26367

        Remove the global variables in bidi.cpp.  Make a new struct, MidpointState, that holds all of the
        midpoint information.  Add the remaining global variables as arguments passed down through functions
        as needed.

        * platform/text/BidiResolver.h:
        (WebCore::MidpointState::MidpointState):
        (WebCore::MidpointState::reset):
        (WebCore::BidiResolver::midpointState):
        * rendering/RenderBlock.h:
        * rendering/bidi.cpp:
        (WebCore::BidiRun::operator delete):
        (WebCore::chopMidpointsAt):
        (WebCore::checkMidpoints):
        (WebCore::addMidpoint):
        (WebCore::appendRunsForObject):
        (WebCore::RenderBlock::bidiReorderLine):
        (WebCore::RenderBlock::layoutInlineChildren):
        (WebCore::RenderBlock::determineStartPosition):
        (WebCore::skipNonBreakingSpace):
        (WebCore::shouldCollapseWhiteSpace):
        (WebCore::requiresLineBox):
        (WebCore::RenderBlock::generatesLineBoxesForInlineChild):
        (WebCore::RenderBlock::skipTrailingWhitespace):
        (WebCore::RenderBlock::skipLeadingWhitespace):
        (WebCore::shouldSkipWhitespaceAfterStartObject):
        (WebCore::RenderBlock::findNextLineBreak):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@44649 268f45cc-cd09-0410-ab3c-d52691b4dbfc