Move FilterEffectRenderer out of RenderLayer into RenderBox.

sky/engine/core/rendering/RenderBox.h

Index: sky/engine/core/rendering/RenderBox.h
diff --git a/sky/engine/core/rendering/RenderBox.h b/sky/engine/core/rendering/RenderBox.h
index 8ce3293f3c60e8b935d726e1231c7465f457b090..0948df5d05e6acf988b7c7d9e31fe2e92451b6b7 100644
--- a/sky/engine/core/rendering/RenderBox.h
+++ b/sky/engine/core/rendering/RenderBox.h
@@ -23,6 +23,7 @@
 #ifndef SKY_ENGINE_CORE_RENDERING_RENDERBOX_H_
 #define SKY_ENGINE_CORE_RENDERING_RENDERBOX_H_
 
+#include "sky/engine/core/rendering/FilterEffectRenderer.h"
 #include "sky/engine/core/rendering/RenderBoxModelObject.h"
 #include "sky/engine/core/rendering/RenderOverflow.h"
 
@@ -485,6 +486,7 @@ protected:
 
 private:
     void updateFromStyle();
+    void updateFilters();
 
     PassRefPtr<HitTestingTransformState> createLocalTransformState(
         RenderLayer* rootLayer, RenderLayer* containerLayer,
@@ -555,6 +557,8 @@ protected:
     // Our overflow information.
     OwnPtr<RenderOverflow> m_overflow;
 
+    OwnPtr<FilterEffectRenderer> m_filterRenderer;
+
 private:
     OwnPtr<RenderLayer> m_layer;
     OwnPtr<RenderBoxRareData> m_rareData;