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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "ui/compositor/layer_tree_owner.h"
      6 
      7 #include "ui/compositor/layer.h"
      8 
      9 namespace ui {
     10 
     11 namespace {
     12 
     13 // Deletes |layer| and all its descendants.
     14 void DeepDeleteLayers(Layer* layer) {
     15   std::vector<Layer*> children = layer->children();
     16   for (std::vector<Layer*>::const_iterator it = children.begin();
     17        it != children.end();
     18        ++it) {
     19     Layer* child = *it;
     20     DeepDeleteLayers(child);
     21   }
     22   delete layer;
     23 }
     24 
     25 }  // namespace
     26 
     27 LayerTreeOwner::LayerTreeOwner(Layer* root) : root_(root) {}
     28 
     29 LayerTreeOwner::~LayerTreeOwner() {
     30   if (root_)
     31     DeepDeleteLayers(root_);
     32 }
     33 
     34 }  // namespace ui
     35