cc: PaintTimeCounter display on the HudLayer in continuous painting mode

cc/layer_tree_impl.cc

Index: cc/layer_tree_impl.cc
diff --git a/cc/layer_tree_impl.cc b/cc/layer_tree_impl.cc
index 769639a4091c9dc2e987c7c7b546658329f23489..ee03d0c556007d1ef61ce3bbe64130a682ebb071 100644
--- a/cc/layer_tree_impl.cc
+++ b/cc/layer_tree_impl.cc
@@ -235,6 +235,10 @@ FrameRateCounter* LayerTreeImpl::frame_rate_counter() const {
   return layer_tree_host_impl_->fpsCounter();
 }
 
+PaintTimeCounter* LayerTreeImpl::paint_time_counter() const {
+  return layer_tree_host_impl_->paintTimeCounter();
+}
+
 bool LayerTreeImpl::IsActiveTree() const {
   return layer_tree_host_impl_->activeTree() == this;
 }