Add code to determine whether a Range in inside fixed position content
        https://bugs.webkit.org/show_bug.cgi?id=65720

        Reviewed by Sam Weinig.

        Propagate the 'wasFixed' flag out from various methods that
        are used when computing the collection of rects or quads
        for a range. Use the flag in Range to computer whether
        the Range is entirely within, partially within, or outside
        of fixed-position content.

        * WebCore.exp.in:
        * accessibility/AccessibilityRenderObject.cpp:
        (WebCore::AccessibilityRenderObject::boundingBoxRect):
        * dom/Range.cpp:
        (WebCore::Range::textRects):
        (WebCore::Range::textQuads):
        * dom/Range.h:
        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::absoluteQuads):
        * rendering/RenderBlock.h:
        * rendering/RenderBox.cpp:
        (WebCore::RenderBox::absoluteQuads):
        * rendering/RenderBox.h:
        * rendering/RenderInline.cpp:
        (WebCore::RenderInline::absoluteQuads):
        * rendering/RenderInline.h:
        * rendering/RenderObject.h:
        (WebCore::RenderObject::absoluteQuads):
        * rendering/RenderText.cpp:
        (WebCore::RenderText::absoluteRectsForRange):
        (WebCore::RenderText::absoluteQuads):
        (WebCore::RenderText::absoluteQuadsForRange):
        * rendering/RenderText.h:
        * rendering/RenderView.cpp:
        (WebCore::RenderView::absoluteQuads):
        * rendering/RenderView.h:
        * rendering/svg/RenderSVGHiddenContainer.cpp:
        (WebCore::RenderSVGHiddenContainer::absoluteQuads):
        * rendering/svg/RenderSVGHiddenContainer.h:
        * rendering/svg/RenderSVGInline.cpp:
        (WebCore::RenderSVGInline::absoluteQuads):
        * rendering/svg/RenderSVGInline.h:
        * rendering/svg/RenderSVGModelObject.cpp:
        (WebCore::RenderSVGModelObject::absoluteQuads):
        * rendering/svg/RenderSVGModelObject.h:
        * rendering/svg/RenderSVGText.cpp:
        (WebCore::RenderSVGText::absoluteQuads):
        * rendering/svg/RenderSVGText.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@92438 268f45cc-cd09-0410-ab3c-d52691b4dbfc