Improve some naming

chrome/browser/ui/libgtk2ui/gtk2_ui.h

Index: chrome/browser/ui/libgtk2ui/gtk2_ui.h
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_ui.h b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
index 0e78131a51b373cb8cd43d8b6f632e4ecb2ee5e1..504e13fc01a17ee2395092d3e90ddf323b58ffa6 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_ui.h
+++ b/chrome/browser/ui/libgtk2ui/gtk2_ui.h
@@ -107,10 +107,10 @@ class Gtk2UI : public views::LinuxUI {
       views::WindowButtonOrderObserver* observer) OVERRIDE;
   virtual void RemoveWindowButtonOrderObserver(
       views::WindowButtonOrderObserver* observer) OVERRIDE;
-  virtual void AddNativeThemeChangeObserver(
-      views::NativeThemeChangeObserver* observer) OVERRIDE;
-  virtual void RemoveNativeThemeChangeObserver(
-      views::NativeThemeChangeObserver* observer) OVERRIDE;
+  virtual void AddSystemThemeChangeObserver(
+      views::SystemThemeChangeObserver* observer) OVERRIDE;
+  virtual void RemoveSystemThemeChangeObserver(
+      views::SystemThemeChangeObserver* observer) OVERRIDE;
   virtual bool UnityIsRunning() OVERRIDE;
   virtual NonClientMiddleClickAction GetNonClientMiddleClickAction() OVERRIDE;
   virtual void NotifyWindowManagerStartupComplete() OVERRIDE;
@@ -247,7 +247,7 @@ class Gtk2UI : public views::LinuxUI {
   ObserverList<views::WindowButtonOrderObserver> observer_list_;
 
   // Observers to notify when the theme state changes.
-  ObserverList<views::NativeThemeChangeObserver> theme_change_observers_;
+  ObserverList<views::SystemThemeChangeObserver> theme_change_observers_;
 
   // Whether we should lower the window on a middle click to the non client
   // area.