cc: Move UI Resource management out of LayerTreeHost.

cc/trees/layer_tree.cc

Index: cc/trees/layer_tree.cc
diff --git a/cc/trees/layer_tree.cc b/cc/trees/layer_tree.cc
index cf0c3bc4760acdc50ee11f53511f2f8162d980bf..7282f52b671098bc8f561d2dc3f5c34a3875ab5d 100644
--- a/cc/trees/layer_tree.cc
+++ b/cc/trees/layer_tree.cc
@@ -720,4 +720,12 @@ void LayerTree::SetNeedsDisplayOnAllLayers() {
     layer->SetNeedsDisplay();
 }
 
+UIResourceManager* LayerTree::GetUIResourceManager() const {
+  return layer_tree_host_->GetUIResourceManager();
+}
+
+const LayerTreeSettings& LayerTree::GetSettings() const {
+  return layer_tree_host_->GetSettings();
+}
+
 }  // namespace cc