Update Windows UI on system color changes.

chrome/browser/themes/theme_service_aurax11.h

 // Copyright 2013 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_THEMES_THEME_SERVICE_AURAX11_H_
 #define CHROME_BROWSER_THEMES_THEME_SERVICE_AURAX11_H_
 
 #include "chrome/browser/themes/theme_service.h"
-#include "ui/views/linux_ui/native_theme_change_observer.h"
 
 // A subclass of ThemeService that manages the CustomThemeSupplier which
 // provides the native X11 theme.
-class ThemeServiceAuraX11 : public ThemeService,
-                            public views::NativeThemeChangeObserver {
+class ThemeServiceAuraX11 : public ThemeService {
  public:
   ThemeServiceAuraX11();
   virtual ~ThemeServiceAuraX11();
 
   // Overridden from ThemeService:
   virtual bool ShouldInitWithNativeTheme() const OVERRIDE;
   virtual void SetNativeTheme() OVERRIDE;
   virtual bool UsingDefaultTheme() const OVERRIDE;
   virtual bool UsingNativeTheme() const OVERRIDE;
 
-  // Overridden from views::NativeThemeChangeObserver:
-  virtual void OnNativeThemeChanged() OVERRIDE;
-
  private:
   DISALLOW_COPY_AND_ASSIGN(ThemeServiceAuraX11);
 };
 
 #endif  // CHROME_BROWSER_THEMES_THEME_SERVICE_AURAX11_H_