Only Record Ugliness Histogram for Compositor Side Changes

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index c413c173e4cb0eba0851002ee0825081824269db..2ef991cfdda68ffdad2f57e0dac43b9153e047b4 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -377,6 +377,8 @@ void LayerTreeHost::FinishCommitOnImplThread(LayerTreeHostImpl* host_impl) {
       sync_tree->ResetContentsTexturesPurged();
   }
 
+  sync_tree->set_has_ever_been_drawn(false);
+
   micro_benchmark_controller_.ScheduleImplBenchmarks(host_impl);
 }