cc: Add a flag to layers that returns true if the layer is in RSLL.

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 5fd42a49e94ca673599a1841e116fa45238ce26a..7565e3a0febe9c214b3ea523e6fb1109928b0b16 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -34,7 +34,8 @@ struct CC_EXPORT DrawProperties {
         index_of_first_descendants_addition(0),
         num_descendants_added(0),
         index_of_first_render_surface_layer_list_addition(0),
-        num_render_surfaces_added(0) {}
+        num_render_surfaces_added(0),
+        last_valid_render_surface_list_count(0) {}
 
   // Transforms objects from content space to target surface space, where
   // this layer would be drawn.
@@ -118,6 +119,7 @@ struct CC_EXPORT DrawProperties {
   size_t num_descendants_added;
   size_t index_of_first_render_surface_layer_list_addition;
   size_t num_render_surfaces_added;
+  int last_valid_render_surface_list_count;

[danakj, 2014/05/05 19:25:41]

Separate this out from he others here and put a comment on it. 

bikeshed: member_of_render_surface_layer_list_iteration or something?

|count| seems to imply something this isn't, like how many times it was in RSLL

[vmpstr, 2014/05/05 20:50:34]

Done.

 };
 
 }  // namespace cc