[skia] not all convex paths are convex, so recompute convexity for the problematic ones
https://bugs.webkit.org/show_bug.cgi?id=75960

Reviewed by Stephen White.

No new tests.
See related chrome issue
http://code.google.com/p/chromium/issues/detail?id=108605

* platform/graphics/skia/GraphicsContextSkia.cpp:
(WebCore::setPathFromConvexPoints):


git-svn-id: svn://svn.chromium.org/blink/trunk@104609 bbb929c8-8fbe-4397-9dbb-9b2b20218538
void GraphicsContext::setPlatformTextDrawingMode(TextDrawingModeFlags mode)
{
    if (paintingDisabled())
        return;

    platformContext()->setTextDrawingMode(mode);
}

void GraphicsContext::setPlatformTextDrawingMode(TextDrawingModeFlags mode)
{
    if (paintingDisabled())
        return;

    platformContext()->setTextDrawingMode(mode);
}
