Remove RenderPart.

sky/engine/core/rendering/compositing/RenderLayerCompositor.h

Index: sky/engine/core/rendering/compositing/RenderLayerCompositor.h
diff --git a/sky/engine/core/rendering/compositing/RenderLayerCompositor.h b/sky/engine/core/rendering/compositing/RenderLayerCompositor.h
index 6c9f67e8f972a8ebed5bfb73bc6902b022819267..23174f06fbb3fd4a61c705e9e5d6b1e5bb1d14f4 100644
--- a/sky/engine/core/rendering/compositing/RenderLayerCompositor.h
+++ b/sky/engine/core/rendering/compositing/RenderLayerCompositor.h
@@ -37,7 +37,6 @@ class DocumentLifecycle;
 class GraphicsLayer;
 class GraphicsLayerFactory;
 class Page;
-class RenderPart;
 class ScrollingCoordinator;
 
 enum CompositingUpdateType {
@@ -133,10 +132,6 @@ public:
 
     void setIsInWindow(bool);
 
-    static RenderLayerCompositor* frameContentsCompositor(RenderPart*);
-    // Return true if the layers changed.
-    static bool parentFrameContentLayers(RenderPart*);
-
     // Update the geometry of the layers used for clipping and scrolling in frames.
     void frameViewDidChangeLocation(const IntPoint& contentsOffset);
     void frameViewDidChangeSize();