Turn FrameView's paintBehavior into a real global

Source/core/paint/VideoPainter.cpp

Index: Source/core/paint/VideoPainter.cpp
diff --git a/Source/core/paint/VideoPainter.cpp b/Source/core/paint/VideoPainter.cpp
index ecb9949b8754a2887d8cd78fe8d51fed9e507d72..c5d58ca9278d723ee9887cfdb49aea9c0eeaf74e 100644
--- a/Source/core/paint/VideoPainter.cpp
+++ b/Source/core/paint/VideoPainter.cpp
@@ -44,7 +44,7 @@ void VideoPainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint&
 
     if (displayingPoster) {
         ImagePainter(m_layoutVideo).paintIntoRect(context, rect);
-    } else if ((m_layoutVideo.document().view() && m_layoutVideo.document().view()->paintBehavior() & PaintBehaviorFlattenCompositingLayers) || !m_layoutVideo.acceleratedRenderingInUse()) {
+    } else if ((gGlobalPaintFlags & GlobalPaintFlattenCompositingLayers) || !m_layoutVideo.acceleratedRenderingInUse()) {
         SkPaint videoPaint = context->fillPaint();
         videoPaint.setColor(SK_ColorBLACK);
         m_layoutVideo.videoElement()->paintCurrentFrame(context->canvas(), pixelSnappedIntRect(rect), &videoPaint);