text: 
  #ifndef cc_trees_LayerTreeHostClient_h
  #define cc_trees_LayerTreeHostClient_h
  
  namespace blink {
  class IntRect;
  }
  
  namespace cc {
  
  class LayerTreeHostClent {
  public:
      virtual void onLayerTreeDirty() = 0;
      virtual void onLayerTreeInvalidateRect(const blink::IntRect&) = 0;
      virtual void onLayerTreeSetNeedsCommit() = 0;
      virtual void enablePaint() {};
      virtual void disablePaint() {};
  };
  
  }
  
  #endif // cc_trees_LayerTreeHostClient_h