MacViews: support backgrounds for selected rows

ui/views/controls/tree/tree_view.h

Index: ui/views/controls/tree/tree_view.h
diff --git a/ui/views/controls/tree/tree_view.h b/ui/views/controls/tree/tree_view.h
index 2dc764e7f5688216ff6944f650fcb66feae0de1a..128e97849a717d0cd13c081e227928d53eb2de55 100644
--- a/ui/views/controls/tree/tree_view.h
+++ b/ui/views/controls/tree/tree_view.h
@@ -294,12 +294,15 @@ class VIEWS_EXPORT TreeView : public ui::TreeModelObserver,
       ui::TreeModelNode* model_node,
       GetInternalNodeCreateType create_type);
 
+  // Returns the bounds for a node's background.
+  gfx::Rect GetBackgroundBoundsForNode(InternalNode* node);
+
   // Returns the bounds for a node.

[tapted, 2016/06/15 03:17:50]

nit: update comment

[Elly Fong-Jones, 2016/06/16 14:42:34]

Done.

-  gfx::Rect GetBoundsForNode(InternalNode* node);
+  gfx::Rect GetTextBoundsForNode(InternalNode* node);
 
   // Implementation of GetBoundsForNode. Separated out as some callers already

[tapted, 2016/06/15 03:17:50]

nit: update comment

[Elly Fong-Jones, 2016/06/16 14:42:34]

Done.

   // know the row/depth.
-  gfx::Rect GetBoundsForNodeImpl(InternalNode* node, int row, int depth);
+  gfx::Rect GetTextBoundsForNodeImpl(InternalNode* node, int row, int depth);
 
   // Returns the row and depth of a node.
   int GetRowForInternalNode(InternalNode* node, int* depth);
@@ -331,6 +334,14 @@ class VIEWS_EXPORT TreeView : public ui::TreeModelObserver,
 
   PrefixSelector* GetPrefixSelector();
 
+  // This function returns the InternalNode (if any) lying under |point|. If no

[tapted, 2016/06/15 03:17:50]

nit: remove "This function" / "this function". 

[Elly Fong-Jones, 2016/06/16 14:42:34]

Done.

+  // node lies under |point|, this function returns nullptr.
+  InternalNode* NodeAtPoint(const gfx::Point& point);
+
+  // This function returns whether |point| is in the bounds of |node|'s

[tapted, 2016/06/15 03:17:50]

nit: Returns whether..

[Elly Fong-Jones, 2016/06/16 14:42:34]

Done.

+  // expand/collapse arrow.
+  bool HitsNodeArrow(InternalNode* node, const gfx::Point& point);
+
   // The model, may be null.
   ui::TreeModel* model_;