cc: Clean up PictureLayer API.

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 5bafbe5829a83a6dbf2bb4ad78e087f15e21b612..fdada66cf237087ca65751230542b3675359d326 100644
--- a/cc/layers/picture_layer.h
+++ b/cc/layers/picture_layer.h
@@ -72,7 +72,16 @@ class CC_EXPORT PictureLayer : public Layer {
 
   int update_source_frame_number_;
   bool is_mask_;
-  bool nearest_neighbor_;
+
+  // Encapsulates all data, callbacks or interfaces received from the embedder.
+  struct Inputs {
+    Inputs();
+    ~Inputs();
+
+    bool nearest_neighbor_;

[Khushal, 2016/07/11 16:43:58]

nit: This should be |nearest_neighbor|. The underscore convention is for private
variables.

+  };
+
+  Inputs inputs_;
 
   DISALLOW_COPY_AND_ASSIGN(PictureLayer);
 };