cc : Make CallFunctionForSubtree on impl use layer iterator

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 92819160c6d5c643b82af935bec906e6e225e573..600f55c8439b73e3adee94daef15b9b6d5200b8e 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1625,11 +1625,11 @@ void LayerTreeHostImpl::DrawLayers(FrameData* frame) {
   TRACE_EVENT_IS_NEW_TRACE(&is_new_trace);
   if (is_new_trace) {
     if (pending_tree_) {
-      LayerTreeHostCommon::CallFunctionForSubtree(
+      LayerTreeHostCommon::CallFunctionForEveryLayer(
           pending_tree_->root_layer(),
           [](LayerImpl* layer) { layer->DidBeginTracing(); });
     }
-    LayerTreeHostCommon::CallFunctionForSubtree(
+    LayerTreeHostCommon::CallFunctionForEveryLayer(
         active_tree_->root_layer(),
         [](LayerImpl* layer) { layer->DidBeginTracing(); });
   }