[not for review] Add Draw entries to window Performance Timeline

cc/trees/layer_tree_host_common.cc

Index: cc/trees/layer_tree_host_common.cc
diff --git a/cc/trees/layer_tree_host_common.cc b/cc/trees/layer_tree_host_common.cc
index 840a32b2ef4a59037f22e33e251c9edee72bc649..68ab3966d55063eac69fa8e4df25af361151898c 100644
--- a/cc/trees/layer_tree_host_common.cc
+++ b/cc/trees/layer_tree_host_common.cc
@@ -25,6 +25,18 @@ ScrollAndScaleSet::ScrollAndScaleSet() {}
 
 ScrollAndScaleSet::~ScrollAndScaleSet() {}
 
+LayerTreeHostCommon::CompositeTimingInfo::CompositeTimingInfo() {
+}
+
+LayerTreeHostCommon::CompositeTimingInfo::~CompositeTimingInfo() {
+}
+
+CompositeTimingSet::CompositeTimingSet() {
+}
+
+CompositeTimingSet::~CompositeTimingSet() {
+}
+
 static void SortLayers(LayerList::iterator forst,
                        LayerList::iterator end,
                        void* layer_sorter) {