Reviewed by Eric Seidel.

        [Haiku] Adding GraphicsContext to WebCore/platform/graphics/haiku.
        https://bugs.webkit.org/show_bug.cgi?id=28130

        * platform/graphics/haiku/GraphicsContextHaiku.cpp: Added.
        (WebCore::GraphicsContextPlatformPrivate::GraphicsContextPlatformPrivate):
        (WebCore::GraphicsContextPlatformPrivate::~GraphicsContextPlatformPrivate):
        (WebCore::GraphicsContext::GraphicsContext):
        (WebCore::GraphicsContext::~GraphicsContext):
        (WebCore::GraphicsContext::platformContext):
        (WebCore::GraphicsContext::savePlatformState):
        (WebCore::GraphicsContext::restorePlatformState):
        (WebCore::GraphicsContext::drawRect):
        (WebCore::GraphicsContext::drawLine):
        (WebCore::GraphicsContext::drawEllipse):
        (WebCore::GraphicsContext::strokeArc):
        (WebCore::GraphicsContext::strokePath):
        (WebCore::GraphicsContext::drawConvexPolygon):
        (WebCore::GraphicsContext::fillRect):
        (WebCore::GraphicsContext::fillRoundedRect):
        (WebCore::GraphicsContext::fillPath):
        (WebCore::GraphicsContext::beginPath):
        (WebCore::GraphicsContext::addPath):
        (WebCore::GraphicsContext::clip):
        (WebCore::GraphicsContext::drawFocusRing):
        (WebCore::GraphicsContext::drawLineForText):
        (WebCore::GraphicsContext::drawLineForMisspellingOrBadGrammar):
        (WebCore::GraphicsContext::roundToDevicePixels):
        (WebCore::GraphicsContext::beginTransparencyLayer):
        (WebCore::GraphicsContext::endTransparencyLayer):
        (WebCore::GraphicsContext::clearRect):
        (WebCore::GraphicsContext::strokeRect):
        (WebCore::GraphicsContext::setLineCap):
        (WebCore::GraphicsContext::setLineJoin):
        (WebCore::GraphicsContext::setMiterLimit):
        (WebCore::GraphicsContext::setAlpha):
        (WebCore::GraphicsContext::setCompositeOperation):
        (WebCore::GraphicsContext::clipOut):
        (WebCore::GraphicsContext::clipToImageBuffer):
        (WebCore::GraphicsContext::getCTM):
        (WebCore::GraphicsContext::translate):
        (WebCore::GraphicsContext::origin):
        (WebCore::GraphicsContext::rotate):
        (WebCore::GraphicsContext::scale):
        (WebCore::GraphicsContext::clipOutEllipseInRect):
        (WebCore::GraphicsContext::addInnerRoundedRectClip):
        (WebCore::GraphicsContext::concatCTM):
        (WebCore::GraphicsContext::setPlatformShouldAntialias):
        (WebCore::GraphicsContext::setImageInterpolationQuality):
        (WebCore::GraphicsContext::setURLForRect):
        (WebCore::GraphicsContext::setPlatformFont):
        (WebCore::GraphicsContext::setPlatformStrokeColor):
        (WebCore::GraphicsContext::getHaikuStrokeStyle):
        (WebCore::GraphicsContext::setPlatformStrokeStyle):
        (WebCore::GraphicsContext::setPlatformStrokeThickness):
        (WebCore::GraphicsContext::setPlatformFillColor):
        (WebCore::GraphicsContext::clearPlatformShadow):
        (WebCore::GraphicsContext::setPlatformShadow):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@47147 268f45cc-cd09-0410-ab3c-d52691b4dbfc