cc: Move tiling management out of draw properties calculation.

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index 3f167b9b0b653c219f001f4072d149e700e0accc..e194b342e8a13765a05181d0fc70851ce0cb7e2a 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -128,6 +128,9 @@ struct CC_EXPORT DrawProperties {
   // or the layer doesn't contribute anything, then this ID will be either out
   // of date or 0.
   int last_drawn_render_surface_layer_list_id;
+
+  float ideal_contents_scale;

[danakj, 2014/05/15 15:15:31]

Can you add a comment for each of these describing what it is, if you're not
sure what to write I can help with it.

+  float maximum_animation_contents_scale;
 };
 
 }  // namespace cc