Remove a bunch of dead code from RenderLayer

sky/engine/core/rendering/RenderObject.cpp

Index: sky/engine/core/rendering/RenderObject.cpp
diff --git a/sky/engine/core/rendering/RenderObject.cpp b/sky/engine/core/rendering/RenderObject.cpp
index 8aed3d1adfaf65d8adc7a8d7c3eca4177f5d4533..3e99760ce56d0d3843e5e0fdb4e2f61730d8dc36 100644
--- a/sky/engine/core/rendering/RenderObject.cpp
+++ b/sky/engine/core/rendering/RenderObject.cpp
@@ -1209,30 +1209,16 @@ const RenderLayerModelObject* RenderObject::containerForPaintInvalidation() cons
 {
     if (!isRooted())
         return 0;
-
-    return adjustCompositedContainerForSpecialAncestors(enclosingCompositedContainer());
-}
-
-const RenderLayerModelObject* RenderObject::enclosingCompositedContainer() const
-{
-    RenderLayerModelObject* container = 0;
-    if (RenderLayer* compositingLayer = enclosingLayer()->enclosingLayerForPaintInvalidationCrossingFrameBoundaries())
-        container = compositingLayer->renderer();
-    return container;
+    // ??

[ojan, 2014/11/29 01:48:15]

Yup. This is right for now. All paint invalidation is WRT to the root now that
we don't have compositing. That'll probably change again when we fix painting
with iframes to work right. I think right now iframes will not paint correctly
between other elements (they'll always go on top?).

+    return view();
 }
 
 const RenderLayerModelObject* RenderObject::adjustCompositedContainerForSpecialAncestors(const RenderLayerModelObject* paintInvalidationContainer) const
 {
     if (paintInvalidationContainer)
         return paintInvalidationContainer;
-
-    RenderView* renderView = view();
-    return renderView;
-}
-
-bool RenderObject::isPaintInvalidationContainer() const
-{
-    return hasLayer() && toRenderLayerModelObject(this)->layer()->isPaintInvalidationContainer();
+    // ??

[ojan, 2014/11/29 01:48:15]

We can get rid of the concept now. We shouldn't have any special ancestors and
we don't have composited containers. I'd just make this a FIXME(sky).

+    return view();
 }
 
 template <typename T>