First step to move common accessibility code out of content.

content/common/ax_node_impl.cc

Index: content/common/ax_node_impl.cc
diff --git a/content/common/ax_node_impl.cc b/content/common/ax_node_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..917827a199c7cb3bcfb480bccee20ad8d23cda04
--- /dev/null
+++ b/content/common/ax_node_impl.cc
@@ -0,0 +1,59 @@
+// Copyright (c) 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 "content/common/ax_node_impl.h"
+
+namespace content {
+
+AXNodeImpl::AXNodeImpl()
+    : index_in_parent_(0),
+      parent_(NULL) {
+}
+
+AXNodeImpl::~AXNodeImpl() {
+}
+
+int32 AXNodeImpl::GetId() const {
+  return data_.id;
+}
+
+AXNode* AXNodeImpl::GetParent() const {
+  return parent_;
+}
+
+int AXNodeImpl::GetChildCount() const {
+  return static_cast<int>(children_.size());
+}
+
+AXNode* AXNodeImpl::ChildAtIndex(int index) const {
+  return children_[index];
+}
+
+const AXNodeData& AXNodeImpl::data() const {
+  return data_;
+}
+
+void AXNodeImpl::Init(AXNodeImpl* parent, int32 id, int32 index_in_parent) {
+  parent_ = parent;
+  data_.id = id;
+  index_in_parent_ = index_in_parent;
+}
+
+void AXNodeImpl::SetData(const AXNodeData& src) {
+  data_ = src;
+}
+
+void AXNodeImpl::UpdateIndexInParent(int index_in_parent) {
+  index_in_parent_ = index_in_parent;
+}
+
+void AXNodeImpl::SwapChildren(std::vector<AXNodeImpl*>& children) {
+  children.swap(children_);
+}
+
+void AXNodeImpl::Destroy() {
+  delete this;
+}
+
+}  // namespace content