[cc] Add nearest neighbor filtering for PictureLayer.

cc/layers/picture_layer.h

Index: cc/layers/picture_layer.h
diff --git a/cc/layers/picture_layer.h b/cc/layers/picture_layer.h
index 01a37a3018e121e4158168564ecc90a592fbbd15..193960be7013b40822fe5683f383f8268d28334c 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -23,6 +23,8 @@ class CC_EXPORT PictureLayer : public Layer {
 
   void ClearClient();
 
+  void SetNearestNeighbor(bool nearest_neighbor);
+
   // Layer interface.
   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void SetLayerTreeHost(LayerTreeHost* host) override;
@@ -66,6 +68,7 @@ class CC_EXPORT PictureLayer : public Layer {
   int update_source_frame_number_;
   bool can_use_lcd_text_for_update_;
   bool is_mask_;
+  bool nearest_neighbor_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };