Implement a paint offset cache for slimming paint v2

Source/core/paint/SVGRootInlineBoxPainter.cpp

Index: Source/core/paint/SVGRootInlineBoxPainter.cpp
diff --git a/Source/core/paint/SVGRootInlineBoxPainter.cpp b/Source/core/paint/SVGRootInlineBoxPainter.cpp
index f687e3606d7461a5fb34c6159e52b0431221c6b8..9d0309fc7a0ea01a968e2bf65b91b2088776f258 100644
--- a/Source/core/paint/SVGRootInlineBoxPainter.cpp
+++ b/Source/core/paint/SVGRootInlineBoxPainter.cpp
@@ -24,8 +24,8 @@ void SVGRootInlineBoxPainter::paint(const PaintInfo& paintInfo, const LayoutPoin
     bool hasSelection = !paintInfo.isPrinting() && m_svgRootInlineBox.selectionState() != SelectionNone;
 
     PaintInfo paintInfoBeforeFiltering(paintInfo);
-    if (hasSelection && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfoBeforeFiltering.context, m_svgRootInlineBox.layoutObject(), paintInfoBeforeFiltering.phase)) {
-        LayoutObjectDrawingRecorder recorder(*paintInfoBeforeFiltering.context, m_svgRootInlineBox.layoutObject(), paintInfoBeforeFiltering.phase, paintInfoBeforeFiltering.rect);
+    if (hasSelection && !LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfoBeforeFiltering.context, m_svgRootInlineBox.layoutObject(), paintInfoBeforeFiltering.phase, paintOffset)) {
+        LayoutObjectDrawingRecorder recorder(*paintInfoBeforeFiltering.context, m_svgRootInlineBox.layoutObject(), paintInfoBeforeFiltering.phase, paintInfoBeforeFiltering.rect, paintOffset);
         for (InlineBox* child = m_svgRootInlineBox.firstChild(); child; child = child->nextOnLine()) {
             if (child->isSVGInlineTextBox())
                 SVGInlineTextBoxPainter(*toSVGInlineTextBox(child)).paintSelectionBackground(paintInfoBeforeFiltering);