Rendering context information added to SharedQuadState

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..8ce504f5ced0228ce6f5181282513595ae19d886 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -35,7 +35,8 @@ struct CC_EXPORT DrawProperties {
         num_descendants_added(0),
         index_of_first_render_surface_layer_list_addition(0),
         num_render_surfaces_added(0),
-        last_drawn_render_surface_layer_list_id(0) {}
+        last_drawn_render_surface_layer_list_id(0),
+        context_id(0) {}
 
   // Transforms objects from content space to target surface space, where
   // this layer would be drawn.
@@ -128,6 +129,8 @@ 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;
+
+  int context_id;
 };
 
 }  // namespace cc