Change DontCheck under-invalidation checking mode to CacheSkipper

Source/core/paint/BoxPainter.cpp

Index: Source/core/paint/BoxPainter.cpp
diff --git a/Source/core/paint/BoxPainter.cpp b/Source/core/paint/BoxPainter.cpp
index aed5b1c83f8f3e65c98872a763bda27afbafc9db..160934f6c864c0aa4a631263a67ee4fc20b294f3 100644
--- a/Source/core/paint/BoxPainter.cpp
+++ b/Source/core/paint/BoxPainter.cpp
@@ -78,19 +78,19 @@ bool bleedAvoidanceIsClipping(BackgroundBleedAvoidance bleedAvoidance)
 
 void BoxPainter::paintBoxDecorationBackgroundWithRect(const PaintInfo& paintInfo, const LayoutPoint& paintOffset, const LayoutRect& paintRect)
 {
-    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutBox, DisplayItem::BoxDecorationBackground, boundsForDrawingRecorder(paintOffset));
-    if (recorder.canUseCachedDrawing())
-        return;
-
     const ComputedStyle& style = m_layoutBox.styleRef();
-    BoxDecorationData boxDecorationData(m_layoutBox);
 
-#if ENABLE(ASSERT)
     // FIXME: For now we don't have notification on media buffered range change from media player
     // and miss paint invalidation on buffered range change. crbug.com/484288.
+    Optional<DisplayItemCacheSkipper> cacheSkipper;
     if (style.appearance() == MediaSliderPart)
-        recorder.setUnderInvalidationCheckingMode(DrawingDisplayItem::DontCheck);
-#endif
+        cacheSkipper.emplace(*paintInfo.context);
+
+    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutBox, DisplayItem::BoxDecorationBackground, boundsForDrawingRecorder(paintOffset));
+    if (recorder.canUseCachedDrawing())
+        return;
+
+    BoxDecorationData boxDecorationData(m_layoutBox);
 
     // FIXME: Should eventually give the theme control over whether the box shadow should paint, since controls could have
     // custom shadows of their own.