Update Windows UI on system color changes.

chrome/browser/themes/theme_service_aurax11.cc

 // 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.
 
 #include "chrome/browser/themes/theme_service_aurax11.h"
 
 #include "base/bind.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/custom_theme_supplier.h"
@@ skipping 46 matching lines @@
 }
 
 bool NativeThemeX11::HasCustomImage(int id) const {
   return linux_ui_ && linux_ui_->HasCustomImage(id);
 }
 
 NativeThemeX11::~NativeThemeX11() {}
 
 }  // namespace
 
-ThemeServiceAuraX11::ThemeServiceAuraX11() {
-  views::LinuxUI* linux_ui = views::LinuxUI::instance();
-  if (linux_ui)
-    linux_ui->AddNativeThemeChangeObserver(this);
-}
+ThemeServiceAuraX11::ThemeServiceAuraX11() {}
 
-ThemeServiceAuraX11::~ThemeServiceAuraX11() {
-  views::LinuxUI* linux_ui = views::LinuxUI::instance();
-  if (linux_ui)
-    linux_ui->RemoveNativeThemeChangeObserver(this);
-}
+ThemeServiceAuraX11::~ThemeServiceAuraX11() {}
 
 bool ThemeServiceAuraX11::ShouldInitWithNativeTheme() const {
   return profile()->GetPrefs()->GetBoolean(prefs::kUsesSystemTheme);
 }
 
 void ThemeServiceAuraX11::SetNativeTheme() {
   SetCustomDefaultTheme(new NativeThemeX11(profile()->GetPrefs()));
 }
 
 bool ThemeServiceAuraX11::UsingDefaultTheme() const {
   return ThemeService::UsingDefaultTheme() && !UsingNativeTheme();
 }
 
 bool ThemeServiceAuraX11::UsingNativeTheme() const {
   const CustomThemeSupplier* theme_supplier = get_theme_supplier();
   return theme_supplier &&
          theme_supplier->get_theme_type() == CustomThemeSupplier::NATIVE_X11;
 }
-
-void ThemeServiceAuraX11::OnNativeThemeChanged() {
-  if (UsingNativeTheme())
-    NotifyThemeChanged();
-}