cc : Make CallFunctionForSubtree on impl use layer iterator

cc/debug/rasterize_and_record_benchmark.cc

Index: cc/debug/rasterize_and_record_benchmark.cc
diff --git a/cc/debug/rasterize_and_record_benchmark.cc b/cc/debug/rasterize_and_record_benchmark.cc
index 74220e75c3c96e1e81aa4c1b0749ff776a009321..0956d171dbe49ce78cae85f394018366edd5b0d1 100644
--- a/cc/debug/rasterize_and_record_benchmark.cc
+++ b/cc/debug/rasterize_and_record_benchmark.cc
@@ -70,9 +70,8 @@ RasterizeAndRecordBenchmark::~RasterizeAndRecordBenchmark() {
 
 void RasterizeAndRecordBenchmark::DidUpdateLayers(LayerTreeHost* host) {
   host_ = host;
-  LayerTreeHostCommon::CallFunctionForSubtree(
-      host->root_layer(),
-      [this](Layer* layer) { layer->RunMicroBenchmark(this); });
+  LayerTreeHostCommon::CallFunctionForEveryLayer(
+      host, [this](Layer* layer) { layer->RunMicroBenchmark(this); });
 
   DCHECK(!results_.get());
   results_ = make_scoped_ptr(new base::DictionaryValue);