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

views/controls/tabbed_pane/native_tabbed_pane_gtk.cc

 // Copyright (c) 2011 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/tabbed_pane/native_tabbed_pane_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
@@ skipping 183 matching lines @@
   DCHECK(index <= GetTabCount());
   GtkWidget* page = gtk_notebook_get_nth_page(GTK_NOTEBOOK(native_view()),
                                               index);
   WidgetGtk* widget = WidgetGtk::GetViewForNative(page);
   DCHECK(widget);
   return widget;
 }
 
 View* NativeTabbedPaneGtk::GetTabViewAt(int index) {
   WidgetGtk* widget = GetWidgetAt(index);
-  DCHECK(widget && widget->GetRootView()->GetChildViewCount() == 1);
+  DCHECK(widget && widget->GetRootView()->child_count() == 1);
   return widget->GetRootView()->GetChildViewAt(0);
 }
 
 void NativeTabbedPaneGtk::OnSwitchPage(int selected_tab_index) {
   TabbedPane::Listener* listener = tabbed_pane_->listener();
   if (listener != NULL)
     listener->TabSelectedAt(selected_tab_index);
 }
 
 // static
 void NativeTabbedPaneGtk::CallSwitchPage(GtkNotebook* widget,
                                          GtkNotebookPage* page,
                                          guint selected_tab_index,
                                          NativeTabbedPaneGtk* tabbed_pane) {
   tabbed_pane->OnSwitchPage(selected_tab_index);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTabbedPaneWrapper, public:
 
 // static
 NativeTabbedPaneWrapper* NativeTabbedPaneWrapper::CreateNativeWrapper(
     TabbedPane* tabbed_pane) {
   return new NativeTabbedPaneGtk(tabbed_pane);
 }
 
 }  // namespace views