cc : Make CallFunctionForSubtree on impl use layer iterator

cc/debug/rasterize_and_record_benchmark_impl.cc

Index: cc/debug/rasterize_and_record_benchmark_impl.cc
diff --git a/cc/debug/rasterize_and_record_benchmark_impl.cc b/cc/debug/rasterize_and_record_benchmark_impl.cc
index 438acd833022ecd6fc5a05dfd0a01a687213be0b..1bede95a3b16e7870a90407c76b7ecc4840e6241 100644
--- a/cc/debug/rasterize_and_record_benchmark_impl.cc
+++ b/cc/debug/rasterize_and_record_benchmark_impl.cc
@@ -125,8 +125,8 @@ RasterizeAndRecordBenchmarkImpl::~RasterizeAndRecordBenchmarkImpl() {}
 
 void RasterizeAndRecordBenchmarkImpl::DidCompleteCommit(
     LayerTreeHostImpl* host) {
-  LayerTreeHostCommon::CallFunctionForSubtree(
-      host->RootLayer(), [this](LayerImpl* layer) {
+  LayerTreeHostCommon::CallFunctionForEveryLayer(
+      host->active_tree(), [this](LayerImpl* layer) {
         rasterize_results_.total_layers++;
         layer->RunMicroBenchmark(this);
       });