Include relationship ARIA objects in serialized accessibility tree

ui/accessibility/ax_enums.idl

 // Copyright 2014 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.
 
 // These should be kept in sync with third_party/WebKit/public/web/WebAXEnums.h
 // until the Chromium and Blink trees are merged.
 namespace ui {
   enum AXEvent {
     activedescendantchanged,
     alert,
@@ skipping 234 matching lines @@
     ax_attr_table_cell_column_index,
     ax_attr_table_cell_column_span,
     ax_attr_table_cell_row_index,
     ax_attr_table_cell_row_span,
 
     // Tree control attributes.
     ax_attr_hierarchical_level,
 
     // Relationships between this element and other elements.
     ax_attr_title_ui_element,
+    ax_attr_activedescendant_id,
 
     // Color value for AX_ROLE_COLOR_WELL, each component is 0..255
     ax_attr_color_value_red,
     ax_attr_color_value_green,
     ax_attr_color_value_blue,
 
     // Inline text attributes.
     ax_attr_text_direction
   };
 
@@ skipping 34 matching lines @@
     ax_attr_canvas_has_fallback
   };
 
   [cpp_omit_enum_type] enum AXIntListAttribute {
     // Ids of nodes that are children of this node logically, but are
     // not children of this node in the tree structure. As an example,
     // a table cell is a child of a row, and an 'indirect' child of a
     // column.
     ax_attr_indirect_child_ids,
 
+    // Relationships between this element and other elements.
+    ax_attr_controls_ids,
+    ax_attr_describedby_ids,
+    ax_attr_flowto_ids,
+    ax_attr_labelledby_ids,
+    ax_attr_owns_ids,
+
     // Character indices where line breaks occur.
     ax_attr_line_breaks,
 
     // For a table, the cell ids in row-major order, with duplicate entries
     // when there's a rowspan or colspan, and with -1 for missing cells.
     // There are always exactly rows * columns entries.
     ax_attr_cell_ids,
 
     // For a table, the unique cell ids in row-major order of their first
     // occurrence.
@@ skipping 13 matching lines @@
     ax_attr_word_ends
   };
 
   [cpp_omit_enum_type] enum AXTextDirection {
     ax_text_direction_lr,
     ax_text_direction_rl,
     ax_text_direction_tb,
     ax_text_direction_bt
   };
 };