Use correct position when setting pos_in_set for tabs.

ui/accessibility/ax_node_data.h

 // 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.
 
 #ifndef UI_ACCESSIBILITY_AX_NODE_DATA_H_
 #define UI_ACCESSIBILITY_AX_NODE_DATA_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 80 matching lines @@
 
   // Setting accessibility attributes.
   void AddStringAttribute(AXStringAttribute attribute,
                           const std::string& value);
   void AddIntAttribute(AXIntAttribute attribute, int value);
   void AddFloatAttribute(AXFloatAttribute attribute, float value);
   void AddBoolAttribute(AXBoolAttribute attribute, bool value);
   void AddIntListAttribute(AXIntListAttribute attribute,
                            const std::vector<int32_t>& value);
 
+  // Validated setting of accessibility attributes.
+  void AddValidatedIntAttribute(AXValidatedIntAttribute attribute, int value);
+
   // Convenience functions, mainly for writing unit tests.
   // Equivalent to AddStringAttribute(ATTR_NAME, name).
   void SetName(const std::string& name);
   void SetName(const base::string16& name);
   // Equivalent to AddStringAttribute(ATTR_VALUE, value).
   void SetValue(const std::string& value);
   void SetValue(const base::string16& value);
 
   // Helper to check whether |state_flag| is set in the given |state|.
   static bool IsFlagSet(uint32_t state, ui::AXState state_flag);
@@ skipping 33 matching lines @@
   // NOTE: this member is a std::unique_ptr because it's rare and gfx::Transform
   // takes up a fair amount of space. The assignment operator and copy
   // constructor both make a duplicate of the owned pointer, so it acts more
   // like a member than a pointer.
   std::unique_ptr<gfx::Transform> transform;
 };
 
 }  // namespace ui
 
 #endif  // UI_ACCESSIBILITY_AX_NODE_DATA_H_