Reviewed by Hyatt. Landed by Maciej.

    Reviewed by Hyatt. Landed by Maciej.

        Adding setPlatformPen/setPlatformFont/setPlatformFillColor
        to graphics context to be able to set consistant state
        on the platform specific painter without having to change
        fill/stroke/font on every operation. This fixes color/stroke/fill
        and font handling in the Qt port.

        * platform/graphics/GraphicsContext.cpp:
        (WebCore::GraphicsContext::setFont):
        (WebCore::GraphicsContext::setPen):
        (WebCore::GraphicsContext::setFillColor):
        (WebCore::GraphicsContext::setPlatformPen):
        (WebCore::GraphicsContext::setPlatformFillColor):
        (WebCore::GraphicsContext::setPlatformFont):
        * platform/graphics/GraphicsContext.h:
        * platform/qt/GraphicsContextQt.cpp:
        (WebCore::toQtCompositionMode):
        (WebCore::toQtLineCap):
        (WebCore::toQtLineJoin):
        (WebCore::toQPenStyle):
        (WebCore::penToQPen):
        (WebCore::TransparencyLayer::TransparencyLayer):
        (WebCore::GraphicsContext::addRoundedRectClip):
        (WebCore::GraphicsContext::setPlatformFont):
        (WebCore::GraphicsContext::setPlatformPen):
        (WebCore::GraphicsContext::setPlatformFillColor):
        * platform/qt/ScrollViewCanvasQt.cpp:
        (WebCore::ScrollViewCanvasQt::ScrollViewCanvasQt):
        (WebCore::ScrollViewCanvasQt::paintEvent):
        (WebCore::ScrollViewCanvasQt::handleKeyEvent):
        * platform/qt/ScrollViewCanvasQt.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17563 268f45cc-cd09-0410-ab3c-d52691b4dbfc