views: add focus ring to TreeView

ui/views/controls/tree/tree_view.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_TREE_TREE_VIEW_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TREE_TREE_VIEW_VIEWS_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 331 matching lines @@
   // Implementation of Expand(). Returns true if at least one node was expanded
   // that previously wasn't.
   bool ExpandImpl(ui::TreeModelNode* model_node);
 
   PrefixSelector* GetPrefixSelector();
 
   // Returns whether |point| is in the bounds of |node|'s expand/collapse
   // control.
   bool IsPointInExpandControl(InternalNode* node, const gfx::Point& point);
 
+  // Returns the View that the focus ring for this TreeView should be drawn
+  // around.
+  View* FindFocusRingView();
+
   // The model, may be null.
   ui::TreeModel* model_;
 
   // Default icons for closed/open.
   gfx::ImageSkia closed_icon_;
   gfx::ImageSkia open_icon_;
 
   // Icons from the model.
   std::vector<gfx::ImageSkia> icons_;
 
@@ skipping 43 matching lines @@
   int text_offset_;
 
   std::unique_ptr<PrefixSelector> selector_;
 
   DISALLOW_COPY_AND_ASSIGN(TreeView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TREE_TREE_VIEW_VIEWS_H_