Fix incorrect use of AXState caused when refactoring two enums into one.

ui/views/controls/tree/tree_view.cc

 // Copyright (c) 2012 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/views/controls/tree/tree_view.h"
 
 #include <algorithm>
 
 #include "base/i18n/rtl.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 388 matching lines @@
       return;
     gfx::Rect bounds(GetBoundsForNodeImpl(node, row, depth));
     if (!bounds.Contains(local_point))
       return;
   }
   View::ShowContextMenu(p, source_type);
 }
 
 void TreeView::GetAccessibleState(ui::AXViewState* state) {
   state->role = ui::AX_ROLE_TREE;
-  state->state = ui::AX_STATE_READ_ONLY;
+  state->AddStateFlag(ui::AX_STATE_READ_ONLY);
   if (!selected_node_)
     return;
 
   // Get selected item info.
   state->role = ui::AX_ROLE_TREE_ITEM;
   state->name = selected_node_->model_node()->GetTitle();
 }
 
 const char* TreeView::GetClassName() const {
   return kViewClassName;
@@ skipping 616 matching lines @@
   if (!is_expanded_)
     return max_width;
   for (int i = 0; i < child_count(); ++i) {
     max_width = std::max(max_width,
                          GetChild(i)->GetMaxWidth(indent, depth + 1));
   }
   return max_width;
 }
 
 }  // namespace views