WIP: Skeleton for paint offset caching

Source/core/paint/InlinePainter.cpp

Index: Source/core/paint/InlinePainter.cpp
diff --git a/Source/core/paint/InlinePainter.cpp b/Source/core/paint/InlinePainter.cpp
index af7e48d24f65ee619872a0b115b7801d3933d3c5..39abb7e85251883dafccbe5177300536a96e6634 100644
--- a/Source/core/paint/InlinePainter.cpp
+++ b/Source/core/paint/InlinePainter.cpp
@@ -53,13 +53,13 @@ void InlinePainter::paintOutline(const PaintInfo& paintInfo, const LayoutPoint&
     if (styleToUse.outlineStyleIsAuto()) {
         if (!LayoutTheme::theme().shouldDrawDefaultFocusRing(&m_layoutInline))
             return;
-        if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutInline, paintInfo.phase))
+        if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*paintInfo.context, m_layoutInline, paintInfo.phase, paintOffset))
             return;
 
         Vector<LayoutRect> focusRingRects;
         m_layoutInline.addOutlineRects(focusRingRects, paintOffset);
 
-        LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutInline, paintInfo.phase, outlinePaintRect(focusRingRects, LayoutPoint()));
+        LayoutObjectDrawingRecorder recorder(*paintInfo.context, m_layoutInline, paintInfo.phase, outlinePaintRect(focusRingRects, LayoutPoint()), paintOffset);
         // Only paint the focus ring by hand if the theme isn't able to draw the focus ring.
         ObjectPainter(m_layoutInline).paintFocusRing(paintInfo, styleToUse, focusRingRects);
         return;
@@ -69,7 +69,7 @@ void InlinePainter::paintOutline(const PaintInfo& paintInfo, const LayoutPoint&
         return;
 
     GraphicsContext* graphicsContext = paintInfo.context;
-    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*graphicsContext, m_layoutInline, paintInfo.phase))
+    if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(*graphicsContext, m_layoutInline, paintInfo.phase, paintOffset))
         return;
 
     Vector<LayoutRect> rects;
@@ -86,7 +86,7 @@ void InlinePainter::paintOutline(const PaintInfo& paintInfo, const LayoutPoint&
     Color outlineColor = m_layoutInline.resolveColor(styleToUse, CSSPropertyOutlineColor);
     bool useTransparencyLayer = outlineColor.hasAlpha();
 
-    LayoutObjectDrawingRecorder recorder(*graphicsContext, m_layoutInline, paintInfo.phase, outlinePaintRect(rects, paintOffset));
+    LayoutObjectDrawingRecorder recorder(*graphicsContext, m_layoutInline, paintInfo.phase, outlinePaintRect(rects, paintOffset), paintOffset);
     if (useTransparencyLayer) {
         graphicsContext->beginLayer(static_cast<float>(outlineColor.alpha()) / 255);
         outlineColor = Color(outlineColor.red(), outlineColor.green(), outlineColor.blue());