Keep track of fixed positioning in accessibility tree.

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 <algorithm>
 
 #include "base/strings/string16.h"
 #include "ui/accessibility/ax_enums.h"
@@ skipping 14 matching lines @@
          data().role == AX_ROLE_LINE_BREAK ||
          data().role == AX_ROLE_INLINE_TEXT_BOX;
 }
 
 void AXNode::SetData(const AXNodeData& src) {
   data_ = src;
 }
 
 void AXNode::SetLocation(int offset_container_id,
                          const gfx::RectF& location,
-                         gfx::Transform* transform) {
+                         gfx::Transform* transform,
+                         bool is_fixed_positioned) {
   data_.offset_container_id = offset_container_id;
   data_.location = location;
   if (transform)
     data_.transform.reset(new gfx::Transform(*transform));
   else
     data_.transform.reset(nullptr);
+  data_.is_fixed_positioned = is_fixed_positioned;
 }
 
 void AXNode::SetIndexInParent(int index_in_parent) {
   index_in_parent_ = index_in_parent;
 }
 
 void AXNode::SwapChildren(std::vector<AXNode*>& children) {
   children.swap(children_);
 }
 
@@ skipping 40 matching lines @@
       if (line_offsets->empty() || line_offsets->back() != *start_offset)
         line_offsets->push_back(*start_offset);
     }
 
     base::string16 text = child->data().GetString16Attribute(ui::AX_ATTR_NAME);
     *start_offset += static_cast<int>(text.length());
   }
 }
 
 }  // namespace ui