views: Get rid of View::SetParent() method.

views/view.h

Index: views/view.h
diff --git a/views/view.h b/views/view.h
index a8dd6c95dcf83fe680b9403eb42c5407e04b7b17..0eed99de58a9f4b957b6137da69b485dbe7cd0f1 100644
--- a/views/view.h
+++ b/views/view.h
@@ -1163,10 +1163,6 @@ class View : public AcceleratorTarget {
                          bool update_tool_tip,
                          bool delete_removed_view);
 
-  // Sets the parent View. This is called automatically by AddChild and is
-  // thus private.
-  void SetParent(View* parent);
-
   // Call ViewHierarchyChanged for all child views on all parents
   void PropagateRemoveNotifications(View* parent);