cc: Fix bug in generating picture layer pairs from 2 lists.

cc/test/fake_picture_layer_impl.cc

Index: cc/test/fake_picture_layer_impl.cc
diff --git a/cc/test/fake_picture_layer_impl.cc b/cc/test/fake_picture_layer_impl.cc
index 43db7bcf8f2f142273c668032ac0a5c3875bcf43..61b2069b792ddb319153bb44ee6bf7fcc7ffd52b 100644
--- a/cc/test/fake_picture_layer_impl.cc
+++ b/cc/test/fake_picture_layer_impl.cc
@@ -137,6 +137,12 @@ void FakePictureLayerImpl::SetRasterSourceOnPending(
   UpdateRasterSource(raster_source, &invalidation_temp, pending_set);
 }
 
+void FakePictureLayerImpl::SetIsDrawnRenderSurfaceLayerListMember(bool is) {
+  draw_properties().last_drawn_render_surface_layer_list_id =
+      is ? layer_tree_impl()->current_render_surface_list_id()
+         : layer_tree_impl()->current_render_surface_list_id() - 1;
+}
+
 void FakePictureLayerImpl::CreateAllTiles() {
   for (size_t i = 0; i < num_tilings(); ++i)
     tilings_->tiling_at(i)->CreateAllTilesForTesting();