Improve some naming

chrome/browser/ui/libgtk2ui/gtk2_border.h

Index: chrome/browser/ui/libgtk2ui/gtk2_border.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_border.h b/chrome/browser/ui/libgtk2ui/gtk2_border.h
index c201f466357d329ea06b529d616ffc49d7788667..1c2276c04784958473056040b70c38e0a61e56ad 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_border.h
+++ b/chrome/browser/ui/libgtk2ui/gtk2_border.h
@@ -9,7 +9,7 @@
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/border.h"
 #include "ui/views/controls/button/button.h"
-#include "ui/views/linux_ui/native_theme_change_observer.h"
+#include "ui/views/linux_ui/system_theme_change_observer.h"
 
 namespace gfx {
 class Canvas;
@@ -25,7 +25,7 @@ class Gtk2UI;
 
 // Draws a gtk button border, and manages the memory of the resulting pixbufs.
 class Gtk2Border : public views::Border,
-                   public views::NativeThemeChangeObserver {
+                   public views::SystemThemeChangeObserver {
  public:
   Gtk2Border(Gtk2UI* gtk2_ui,
              views::LabelButton* owning_button,
@@ -37,8 +37,8 @@ class Gtk2Border : public views::Border,
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual gfx::Size GetMinimumSize() const OVERRIDE;
 
-  // Overridden from views::NativeThemeChangeObserver:
-  virtual void OnNativeThemeChanged() OVERRIDE;
+  // Overridden from views::SystemThemeChangeObserver:
+  virtual void OnSystemThemeChanged() OVERRIDE;
 
  private:
   void PaintState(const ui::NativeTheme::State state,