[WIP] Adding support for <iframe>s to slimming paint.

Source/core/paint/ClipRecorder.cpp

Index: Source/core/paint/ClipRecorder.cpp
diff --git a/Source/core/paint/ClipRecorder.cpp b/Source/core/paint/ClipRecorder.cpp
index c59c85fddcdc7fde8e6ce678d66cef12e8160d91..1c903eee23988cb6b318ddac97a162880708087c 100644
--- a/Source/core/paint/ClipRecorder.cpp
+++ b/Source/core/paint/ClipRecorder.cpp
@@ -36,7 +36,7 @@ ClipRecorder::ClipRecorder(RenderLayer* renderLayer, GraphicsContext* graphicsCo
         graphicsContext->clip(snappedClipRect);
     } else {
         m_clipDisplayItem = new ClipDisplayItem(0, renderLayer, clipType, snappedClipRect);
-        m_renderLayer->renderer()->view()->viewDisplayList().add(adoptPtr(m_clipDisplayItem));
+        ViewDisplayList::fromRenderLayer(m_renderLayer).add(adoptPtr(m_clipDisplayItem));
     }
 }
 
@@ -52,7 +52,7 @@ ClipRecorder::~ClipRecorder()
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         OwnPtr<EndClipDisplayItem> endClip = adoptPtr(new EndClipDisplayItem);
-        m_renderLayer->renderer()->view()->viewDisplayList().add(endClip.release());
+        ViewDisplayList::fromRenderLayer(m_renderLayer).add(endClip.release());
     } else {
         m_graphicsContext->restore();
     }