Roll Chrome into Mojo.

cc/surfaces/surface_aggregator.cc

Index: cc/surfaces/surface_aggregator.cc
diff --git a/cc/surfaces/surface_aggregator.cc b/cc/surfaces/surface_aggregator.cc
index 9456dd29c4be152ec529a03888e9ec1ef562af9d..15f4b538cea9b28b7ffbd705c2e7b2e22f0b36e1 100644
--- a/cc/surfaces/surface_aggregator.cc
+++ b/cc/surfaces/surface_aggregator.cc
@@ -433,6 +433,10 @@ void SurfaceAggregator::RemoveUnreferencedChildren() {
         provider_->DestroyChild(it->second);
         surface_id_to_resource_child_id_.erase(it);
       }
+
+      Surface* surface_ptr = manager_->GetSurfaceForId(surface.first);
+      if (surface_ptr)
+        surface_ptr->RunDrawCallbacks(SurfaceDrawStatus::DRAW_SKIPPED);
     }
   }
 }