Delete most of rendering/compositing.

sky/engine/platform/graphics/GraphicsLayer.h

Index: sky/engine/platform/graphics/GraphicsLayer.h
diff --git a/sky/engine/platform/graphics/GraphicsLayer.h b/sky/engine/platform/graphics/GraphicsLayer.h
index 89253847c110b196a0c538c0623ce5b8f2935712..8e2e57101896b86d58a85a3a69e3adec606c4a7a 100644
--- a/sky/engine/platform/graphics/GraphicsLayer.h
+++ b/sky/engine/platform/graphics/GraphicsLayer.h
@@ -195,15 +195,8 @@ public:
     // For hosting this GraphicsLayer in a native layer hierarchy.
     WebLayer* platformLayer() const;
 
-    typedef HashMap<int, int> RenderingContextMap;
-    PassRefPtr<JSONObject> layerTreeAsJSON(LayerTreeFlags, RenderingContextMap&) const;
-
     int paintCount() const { return m_paintCount; }
 
-    // Return a string with a human readable form of the layer tree, If debug is true
-    // pointers for the layers and timing data will be included in the returned string.
-    String layerTreeAsText(LayerTreeFlags = LayerTreeNormal) const;
-
     void resetTrackedPaintInvalidations();
     void addRepaintRect(const FloatRect&);
 
@@ -325,9 +318,4 @@ private:
 
 } // namespace blink
 
-#ifndef NDEBUG
-// Outside the WebCore namespace for ease of invocation from gdb.
-void PLATFORM_EXPORT showGraphicsLayerTree(const blink::GraphicsLayer*);
-#endif
-
 #endif  // SKY_ENGINE_PLATFORM_GRAPHICS_GRAPHICSLAYER_H_