cc: Stop pushing properties every activation for picture layers.

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index 15fdb4320eea2c640107054bfef7298e423ce0fa..6e26928b146d86ec4f2eb04159039fa3c39523be 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -33,6 +33,10 @@ class RasterSource;
 
 class CC_EXPORT PictureLayerTilingClient {
  public:
+  // Callback to notify the client that the PictureLayerTilingSet changed (ie. a
+  // tiling was added or removed).

[vmpstr, 2015/01/23 20:57:58]

From the patch you have, this doesn't include any type of priority/rect changes,
should it?

[danakj, 2015/01/23 21:11:36]

I don't think so.. live rect changes would come with a new rastersource if
they're changes from the pending tree.

The pending tree only has a single tiling, so it doesn't just change tiling
priority, it would remove/add a tiling.

+  virtual void TilingSetChanged() = 0;
+
   // Create a tile at the given content_rect (in the contents scale of the
   // tiling) This might return null if the client cannot create such a tile.
   virtual scoped_refptr<Tile> CreateTile(float contents_scale,