Fix performance regression caused by adding setting of stroke colors as well as fill colors to every font drawing
        call on Mac.  Fix is rather involved:

        (1) Fill color is now updated in CG synchronously.  There is no more delay in the push.  I used the model that
        Qt added for this, setPlatformFillColor, so we're the same now.

        (2) Text was being drawn using the pen color, which is tantamount to using the stroke color.  Since text in HTML
        is really a fill and not a stroke, all cross-platform code that draws text has been patched to use fill instead
        of the pen.

        (3) Added a new API to GraphicsContext to set the text drawing mode to any combination of fill/stroke/clip.
        Ports should implement setPlatformTextDrawingMode or just query the mode in their drawGlyphs/drawComplexText
        method on their Font class to get the new functionality.

        (4) InlineTextBox will set the fill and stroke colors appropriately now rather than always assuming fill.

        (5) Fixed a bug in GraphicsContextCG where fillRectWithColor was updating the CG fill color in the state object
        as a side effect, creating a mismatch between CG's fill color and the stored cross-platform fill color.

        Reviewed by olliej

        * platform/graphics/GraphicsContext.cpp:
        (WebCore::GraphicsContextState::GraphicsContextState):
        (WebCore::GraphicsContext::textDrawingMode):
        (WebCore::GraphicsContext::setTextDrawingMode):
        (WebCore::GraphicsContext::setPlatformTextDrawingMode):
        (WebCore::GraphicsContext::setPlatformPen):
        * platform/graphics/GraphicsContext.h:
        * platform/graphics/cg/GraphicsContextCG.cpp:
        (WebCore::GraphicsContext::fillRect):
        (WebCore::GraphicsContext::setPlatformTextDrawingMode):
        (WebCore::GraphicsContext::setPlatformFillColor):
        * platform/graphics/svg/cg/SVGPaintServerGradientCg.cpp:
        (WebCore::SVGPaintServerGradient::teardown):
        (WebCore::SVGPaintServerGradient::setup):
        * platform/graphics/svg/cg/SVGPaintServerPatternCg.cpp:
        (WebCore::SVGPaintServerPattern::setup):
        (WebCore::SVGPaintServerPattern::teardown):
        * platform/graphics/svg/cg/SVGPaintServerSolidCg.cpp:
        (WebCore::SVGPaintServerSolid::setup):
        * platform/mac/FontMac.mm:
        (WebCore::Font::drawComplexText):
        (WebCore::Font::drawGlyphs):
        * platform/mac/WebCoreTextRenderer.mm:
        (WebCoreDrawTextAtPoint):
        * rendering/EllipsisBox.cpp:
        (WebCore::EllipsisBox::paint):
        * rendering/InlineTextBox.cpp:
        (WebCore::correctedTextColor):
        (WebCore::updateTextColor):
        (WebCore::InlineTextBox::paint):
        (WebCore::InlineTextBox::paintSelection):
        (WebCore::InlineTextBox::paintMarkedTextBackground):
        (WebCore::InlineTextBox::paintTextMatchMarker):
        * rendering/RenderFileUploadControl.cpp:
        (WebCore::RenderFileUploadControl::paintObject):
        * rendering/RenderListBox.cpp:
        (WebCore::RenderListBox::paintItemForeground):
        * rendering/RenderListMarker.cpp:
        (WebCore::RenderListMarker::paint):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@18290 268f45cc-cd09-0410-ab3c-d52691b4dbfc