WIP: Skeleton for paint offset caching

Source/core/paint/ObjectPainter.cpp

Index: Source/core/paint/ObjectPainter.cpp
diff --git a/Source/core/paint/ObjectPainter.cpp b/Source/core/paint/ObjectPainter.cpp
index 2d43a1d15aa113439344e85312e0f0589606f9b2..eb540a2ec0b27c1363eb7193bd307ef4a62adbbf 100644
--- a/Source/core/paint/ObjectPainter.cpp
+++ b/Source/core/paint/ObjectPainter.cpp
@@ -32,16 +32,16 @@ void ObjectPainter::paintFocusRing(const PaintInfo& paintInfo, const ComputedSty
     paintInfo.context->drawFocusRing(focusRingIntRects, style.outlineWidth(), style.outlineOffset(), m_layoutObject.resolveColor(style, CSSPropertyOutlineColor));
 }
 
-void ObjectPainter::paintOutline(const PaintInfo& paintInfo, const LayoutRect& objectBounds, const LayoutRect& visualOverflowBounds)
+void ObjectPainter::paintOutline(const PaintInfo& paintInfo, const LayoutRect& objectBounds, const LayoutRect& visualOverflowBounds, const LayoutPoint& paintOffset)
 {
     const ComputedStyle& styleToUse = m_layoutObject.styleRef();
     if (!styleToUse.hasOutline())
         return;
 
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutObject, paintInfo.phase))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutObject, paintInfo.phase, paintOffset))
         return;
 
-    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutObject, paintInfo.phase, visualOverflowBounds);
+    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutObject, paintInfo.phase, visualOverflowBounds, paintOffset);
 
     if (styleToUse.outlineStyleIsAuto()) {
         if (LayoutTheme::theme().shouldDrawDefaultFocusRing(&m_layoutObject)) {
@@ -84,10 +84,10 @@ void ObjectPainter::addPDFURLRectIfNeeded(const PaintInfo& paintInfo, const Layo
     if (rect.isEmpty())
         return;
 
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutObject, DisplayItem::PrintedContentPDFURLRect))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutObject, DisplayItem::PrintedContentPDFURLRect, paintOffset))
         return;
 
-    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutObject, DisplayItem::PrintedContentPDFURLRect, rect);
+    LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutObject, DisplayItem::PrintedContentPDFURLRect, rect, paintOffset);
     if (url.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(url, m_layoutObject.document().baseURL())) {
         String fragmentName = url.fragmentIdentifier();
         if (m_layoutObject.document().findAnchor(fragmentName))