GTK: First draft of using native themes, partially based on evan's CL 118358.

chrome/browser/gtk/back_forward_button_gtk.h

 // Copyright (c) 2009 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 CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_
-#define CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_
+#ifndef CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_H_
+#define CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_H_
 
 #include "base/scoped_ptr.h"
 #include "base/task.h"
 #include "chrome/browser/gtk/custom_button.h"
 
 class BackForwardMenuModelGtk;
 class Browser;
 class MenuGtk;
 
 typedef struct _GtkWidget GtkWidget;
 
 // When clicked, these buttons will navigate forward or backward. When
 // pressed and held, they show a dropdown menu of recent web sites.
 class BackForwardButtonGtk {
  public:
   BackForwardButtonGtk(Browser* browser, bool is_forward);
   virtual ~BackForwardButtonGtk();
 
   // The dropdown menu is no longer showing.
   void StoppedShowingMenu();
 
   GtkWidget* widget() { return button_->widget(); }
 
+  // Advises our CustomDrawButtons on how to render.
+  void SetUseSystemTheme(bool use_gtk);
+
  private:
   // Executes the browser command.
   static void OnClick(GtkWidget* widget, BackForwardButtonGtk* button);
 
   // Starts a timer to show the dropdown menu.
   static gboolean OnButtonPress(GtkWidget* button,
                                 GdkEventButton* event,
                                 BackForwardButtonGtk* toolbar);
 
   static gboolean OnButtonRelease(GtkWidget* button,
@@ skipping 28 matching lines @@
   scoped_ptr<BackForwardMenuModelGtk> menu_model_;
 
   // The y position of the last mouse down event.
   int y_position_of_last_press_;
 
   ScopedRunnableMethodFactory<BackForwardButtonGtk> show_menu_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BackForwardButtonGtk);
 };
 
-#endif  // CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_
+#endif  // CHROME_BROWSER_GTK_BACK_FORWARD_BUTTON_GTK_H_