Add the ubercomp DelegatedRendererLayer.

cc/RenderSurfaceChromium.h

Index: cc/RenderSurfaceChromium.h
diff --git a/cc/RenderSurfaceChromium.h b/cc/RenderSurfaceChromium.h
index 22d8880a4bc7b66ec80c64882f421a2d170d7390..e9fa52203e5ed537f3d358c6f16916b068b6d18c 100644
--- a/cc/RenderSurfaceChromium.h
+++ b/cc/RenderSurfaceChromium.h
@@ -57,8 +57,11 @@ public:
     const IntRect& clipRect() const { return m_clipRect; }
     void setClipRect(const IntRect& clipRect) { m_clipRect = clipRect; }
 
-    void clearLayerList() { m_layerList.clear(); }
     Vector<RefPtr<LayerChromium> >& layerList() { return m_layerList; }
+    // A no-op since DelegatedRendererLayers on the main thread don't have any
+    // RenderPasses so they can't contribute to a surface.
+    void addContributingDelegatedRenderPassLayer(LayerChromium*) { }
+    void clearLayerLists() { m_layerList.clear(); }
 
     void setNearestAncestorThatMovesPixels(RenderSurfaceChromium* surface) { m_nearestAncestorThatMovesPixels = surface; }
     const RenderSurfaceChromium* nearestAncestorThatMovesPixels() const { return m_nearestAncestorThatMovesPixels; }