Refactor content/ to use ui::AXNodeData instead of blink.

ui/accessibility/ax_tree.cc

Index: ui/accessibility/ax_tree.cc
diff --git a/ui/accessibility/ax_tree.cc b/ui/accessibility/ax_tree.cc
index 5edb649ae85ef0536d777e2022988508138adee8..51aa13ff8ca113f42c575ffed6324e801ae90e97 100644
--- a/ui/accessibility/ax_tree.cc
+++ b/ui/accessibility/ax_tree.cc
@@ -12,6 +12,20 @@
 
 namespace ui {
 
+namespace {
+
+std::string TreeToStringHelper(AXNode* node, int indent) {
+  std::string result;
+  for (int i = 0; i < indent; i++)
+    result += "  ";
+  result += node->data().ToString() + "\n";
+  for (int i = 0; i < node->child_count(); ++i)
+    result += TreeToStringHelper(node->ChildAtIndex(i), indent + 1);
+  return result;
+}
+
+}  // anonymous namespace
+
 AXTree::AXTree()
     : root_(NULL) {
   AXNodeData root;
@@ -81,6 +95,10 @@ bool AXTree::Unserialize(const AXTreeUpdate& update) {
   return true;
 }
 
+std::string AXTree::ToString() const {
+  return TreeToStringHelper(root_, 0);
+}
+
 AXNode* AXTree::CreateNode(AXNode* parent, int32 id, int32 index_in_parent) {
   return new AXNode(parent, id, index_in_parent);
 }