Implement clip and scroll DisplayItems for PartPainter

Source/core/paint/ReplacedPainter.cpp

Index: Source/core/paint/ReplacedPainter.cpp
diff --git a/Source/core/paint/ReplacedPainter.cpp b/Source/core/paint/ReplacedPainter.cpp
index 0edf96fa1936921c546edc534bd7c40d4deb3e4a..07a0306f9ebfe6f3d5da8345668817aadc33e50c 100644
--- a/Source/core/paint/ReplacedPainter.cpp
+++ b/Source/core/paint/ReplacedPainter.cpp
@@ -9,6 +9,7 @@
 #include "core/paint/GraphicsContextAnnotator.h"
 #include "core/paint/ObjectPainter.h"
 #include "core/paint/RenderDrawingRecorder.h"
+#include "core/paint/RoundedInnerRectClipper.h"
 #include "core/rendering/PaintInfo.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderReplaced.h"
@@ -61,6 +62,7 @@ void ReplacedPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paint
         return;
 
     bool completelyClippedOut = false;
+    OwnPtr<RoundedInnerRectClipper> clipper;
     if (m_renderReplaced.style()->hasBorderRadius()) {
         LayoutRect borderRect = LayoutRect(adjustedPaintOffset, m_renderReplaced.size());
 
@@ -71,7 +73,8 @@ void ReplacedPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paint
             paintInfo.context->save();
             FloatRoundedRect roundedInnerRect = m_renderReplaced.style()->getRoundedInnerBorderFor(paintRect,
                 m_renderReplaced.paddingTop() + m_renderReplaced.borderTop(), m_renderReplaced.paddingBottom() + m_renderReplaced.borderBottom(), m_renderReplaced.paddingLeft() + m_renderReplaced.borderLeft(), m_renderReplaced.paddingRight() + m_renderReplaced.borderRight(), true, true);
-            BoxPainter::clipRoundedInnerRect(paintInfo.context, paintRect, roundedInnerRect);
+
+            clipper = adoptPtr(new RoundedInnerRectClipper(m_renderReplaced, paintInfo, paintRect, roundedInnerRect, ApplyToContext));
         }
     }
 
@@ -81,10 +84,8 @@ void ReplacedPainter::paint(const PaintInfo& paintInfo, const LayoutPoint& paint
         } else {
             m_renderReplaced.paintReplaced(paintInfo, adjustedPaintOffset);
         }
-
-        if (m_renderReplaced.style()->hasBorderRadius())
-            paintInfo.context->restore();
     }
+    clipper.clear();
 
     // The selection tint never gets clipped by border-radius rounding, since we want it to run right up to the edges of
     // surrounding content.