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

Source/core/rendering/RenderView.h

Index: Source/core/rendering/RenderView.h
diff --git a/Source/core/rendering/RenderView.h b/Source/core/rendering/RenderView.h
index ddb69d3a090dc0b1019f6f43c8dd926f70e63622..1bd56c2463e568abaa5bd0acdae4f5f59ddb2be0 100644
--- a/Source/core/rendering/RenderView.h
+++ b/Source/core/rendering/RenderView.h
@@ -23,7 +23,6 @@
 #define RenderView_h
 
 #include "core/frame/FrameView.h"
-#include "core/paint/ViewDisplayList.h"
 #include "core/rendering/LayoutState.h"
 #include "core/rendering/PaintInvalidationState.h"
 #include "core/rendering/RenderBlockFlow.h"
@@ -165,14 +164,6 @@ public:
     void popLayoutState();
     virtual void invalidateTreeIfNeeded(const PaintInvalidationState&) override final;
 
-    ViewDisplayList& viewDisplayList()
-    {
-        ASSERT(RuntimeEnabledFeatures::slimmingPaintEnabled());
-        if (!m_viewDisplayList)
-            m_viewDisplayList = adoptPtr(new ViewDisplayList());
-        return *m_viewDisplayList;
-    }
-
 private:
     virtual void mapLocalToContainer(const RenderLayerModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = 0) const override;
     virtual const RenderObject* pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap&) const override;
@@ -209,7 +200,6 @@ private:
     unsigned m_renderCounterCount;
 
     unsigned m_hitTestCount;
-    OwnPtr<ViewDisplayList> m_viewDisplayList;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderView, isRenderView());