Raster display item lists via a visual rect RTree.

cc/base/rtree.cc

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/base/rtree.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 
@@ skipping 89 matching lines @@
   for (uint16_t i = 0; i < node->num_children; ++i) {
     if (query.Intersects(node->children[i].bounds)) {
       if (node->level == 0)
         results->push_back(node->children[i].index);
       else
         SearchRecursive(node->children[i].subtree, query, results);
     }
   }
 }
 
+gfx::Rect RTree::GetBounds() const {
+  return root_.bounds;
+}
+
 }  // namespace cc