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

Source/core/paint/ClipRecorder.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/paint/ClipRecorder.h"
 
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderView.h"
@@ skipping 18 matching lines @@
 ClipRecorder::ClipRecorder(RenderLayer* renderLayer, GraphicsContext* graphicsContext, DisplayItem::Type clipType, const ClipRect& clipRect)
     : m_graphicsContext(graphicsContext)
     , m_renderLayer(renderLayer)
 {
     IntRect snappedClipRect = pixelSnappedIntRect(clipRect.rect());
     if (!RuntimeEnabledFeatures::slimmingPaintEnabled()) {
         graphicsContext->save();
         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));
     }
 }
 
 void ClipRecorder::addRoundedRectClip(const RoundedRect& roundedRect)
 {
     if (RuntimeEnabledFeatures::slimmingPaintEnabled())
         m_clipDisplayItem->roundedRectClips().append(roundedRect);
     else
         m_graphicsContext->clipRoundedRect(roundedRect);
 }
 
 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();
     }
 }
 
 #ifndef NDEBUG
 WTF::String ClipDisplayItem::asDebugString() const
 {
     return String::format("{%s, type: \"%s\", clipRect: [%d,%d,%d,%d]}",
         rendererDebugString(renderer()).utf8().data(), typeAsDebugString(type()).utf8().data(),
         m_clipRect.x(), m_clipRect.y(), m_clipRect.width(), m_clipRect.height());
 }
 #endif
 
 } // namespace blink