Rework tree APIs to reflect Google style and more const-correctness....

views/controls/button/native_button_gtk.cc

 // Copyright (c) 2010 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 "views/controls/button/native_button_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include <vector>
 
@@ skipping 215 matching lines @@
   // button is added to, or removed.
   DCHECK(group);
   GtkRadioButton* this_radio_button = GTK_RADIO_BUTTON(native_view());
   if (!g_slist_find(group, this_radio_button))
     gtk_radio_button_set_group(this_radio_button, group);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeRadioButtonGtk, NativeControlGtk overrides:
 void NativeRadioButtonGtk::ViewHierarchyChanged(bool is_add,
-                                                View *parent, View *child) {
+                                                View* parent, View* child) {
   NativeControlGtk::ViewHierarchyChanged(is_add, parent, child);
 
   // look for the same group and update
   if (is_add && child == this) {
-    View* container = GetParent();
-    while (container && container->GetParent())
-      container = container->GetParent();
+    View* container = parent;
+    while (container && container->parent())
+      container = container->parent();
     if (container) {
       std::vector<View*> other;
       container->GetViewsWithGroup(native_button_->GetGroup(), &other);
       for (std::vector<View*>::iterator i = other.begin();
            i != other.end();
            ++i) {
         if (*i != native_button_) {
           if ((*i)->GetClassName() != RadioButton::kViewClassName) {
             NOTREACHED() << "radio-button has same group as other non "
                 "radio-button views.";
@@ skipping 39 matching lines @@
   return new NativeCheckboxGtk(checkbox);
 }
 
 // static
 NativeButtonWrapper* NativeButtonWrapper::CreateRadioButtonWrapper(
     RadioButton* radio_button) {
   return new NativeRadioButtonGtk(radio_button);
 }
 
 }  // namespace views