Reviewed by Nikolas Zimmermann.

        GraphicsContext: Make drawFocusRing() take a Path instead of a Vector<Path>
        https://bugs.webkit.org/show_bug.cgi?id=49840

        This avoid copying a Path object when drawing focus rings.

        * platform/graphics/GraphicsContext.h:
        * platform/graphics/cairo/GraphicsContextCairo.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/haiku/GraphicsContextHaiku.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/mac/GraphicsContextMac.mm:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/qt/GraphicsContextQt.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/skia/GraphicsContextSkia.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/win/GraphicsContextCGWin.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/wince/GraphicsContextWinCE.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * platform/graphics/wx/GraphicsContextWx.cpp:
        (WebCore::GraphicsContext::drawFocusRing):
        * rendering/RenderImage.h:
        * rendering/RenderImage.cpp:
        (WebCore::RenderImage::paint):
        (WebCore::RenderImage::paintFocusRing):
        Renamed from paintFocusRings since it only paints one ring.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@72528 268f45cc-cd09-0410-ab3c-d52691b4dbfc