Use relative bounding boxes throughout Chrome accessibility

ui/accessibility/ax_node.cc

 // Copyright 2013 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 "ui/accessibility/ax_node.h"
+#include "ui/gfx/transform.h"
 
 namespace ui {
 
 AXNode::AXNode(AXNode* parent, int32_t id, int32_t index_in_parent)
     : index_in_parent_(index_in_parent), parent_(parent) {
   data_.id = id;
 }
 
 AXNode::~AXNode() {
 }
 
 void AXNode::SetData(const AXNodeData& src) {
   data_ = src;
 }
 
-void AXNode::SetLocation(const gfx::RectF& new_location) {
-  data_.location = new_location;
+void AXNode::SetLocation(int offset_container_id,
+                         const gfx::RectF& location,
+                         gfx::Transform* transform) {
+  data_.offset_container_id = offset_container_id;
+  data_.location = location;
+  if (transform)
+    data_.transform.reset(new gfx::Transform(*transform));
+  else
+    data_.transform.reset(nullptr);
 }
 
 void AXNode::SetIndexInParent(int index_in_parent) {
   index_in_parent_ = index_in_parent;
 }
 
 void AXNode::SwapChildren(std::vector<AXNode*>& children) {
   children.swap(children_);
 }
 
 void AXNode::Destroy() {
   delete this;
 }
 
 bool AXNode::IsDescendantOf(AXNode* ancestor) {
   if (this == ancestor)
     return true;
   else if (parent())
     return parent()->IsDescendantOf(ancestor);
 
   return false;
 }
 
 }  // namespace ui