WIP: Skeleton for paint offset caching

Source/core/paint/BlockPainter.cpp

Index: Source/core/paint/BlockPainter.cpp
diff --git a/Source/core/paint/BlockPainter.cpp b/Source/core/paint/BlockPainter.cpp
index fa3bd8fdc40e0f87b703d8c4106853eab75b144f..6ae6319a23cc73c3d3830607add46a7e7d03f13f 100644
--- a/Source/core/paint/BlockPainter.cpp
+++ b/Source/core/paint/BlockPainter.cpp
@@ -227,7 +227,7 @@ void BlockPainter::paintObject(const PaintInfo& paintInfo, const LayoutPoint& pa
         // Don't paint focus ring for anonymous block continuation because the
         // inline element having outline-style:auto paints the whole focus ring.
         if (!m_layoutBlock.style()->outlineStyleIsAuto() || !m_layoutBlock.isAnonymousBlockContinuation())
-            ObjectPainter(m_layoutBlock).paintOutline(paintInfo, LayoutRect(paintOffset, m_layoutBlock.size()), visualOverflowRectWithPaintOffset(m_layoutBlock, paintOffset));
+            ObjectPainter(m_layoutBlock).paintOutline(paintInfo, LayoutRect(paintOffset, m_layoutBlock.size()), visualOverflowRectWithPaintOffset(m_layoutBlock, paintOffset), paintOffset);
     }
 
     if (paintPhase == PaintPhaseOutline || paintPhase == PaintPhaseChildOutlines)
@@ -235,8 +235,8 @@ void BlockPainter::paintObject(const PaintInfo& paintInfo, const LayoutPoint& pa
 
     // If the caret's node's layout object's containing block is this block, and the paint action is PaintPhaseForeground,
     // then paint the caret.
-    if (paintPhase == PaintPhaseForeground && hasCaret() && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutBlock, DisplayItem::Caret)) {
-        LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutBlock, DisplayItem::Caret, visualOverflowRectWithPaintOffset(m_layoutBlock, paintOffset));
+    if (paintPhase == PaintPhaseForeground && hasCaret() && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutBlock, DisplayItem::Caret, paintOffset)) {
+        LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutBlock, DisplayItem::Caret, visualOverflowRectWithPaintOffset(m_layoutBlock, paintOffset), paintOffset);
         paintCarets(paintInfo, paintOffset);
     }
 }