Update Windows UI on system color changes.

chrome/browser/ui/libgtk2ui/gtk2_border.cc

Index: chrome/browser/ui/libgtk2ui/gtk2_border.cc
diff --git a/chrome/browser/ui/libgtk2ui/gtk2_border.cc b/chrome/browser/ui/libgtk2ui/gtk2_border.cc
index eefa5a49c7c227fedb6d6d56e240f56724b7f253..4a8004e9169069e8fa170bcda43b429623dfc310 100644
--- a/chrome/browser/ui/libgtk2ui/gtk2_border.cc
+++ b/chrome/browser/ui/libgtk2ui/gtk2_border.cc
@@ -7,6 +7,7 @@
 #include <gtk/gtk.h>
 
 #include "chrome/browser/ui/libgtk2ui/gtk2_ui.h"
+#include "chrome/browser/ui/libgtk2ui/native_theme_gtk2.h"
 #include "third_party/skia/include/effects/SkLerpXfermode.h"
 #include "ui/base/theme_provider.h"
 #include "ui/gfx/animation/animation.h"
@@ -76,11 +77,11 @@ Gtk2Border::Gtk2Border(Gtk2UI* gtk2_ui,
     : gtk2_ui_(gtk2_ui),
       owning_button_(owning_button),
       border_(border.Pass()) {
-  gtk2_ui_->AddNativeThemeChangeObserver(this);
+  NativeThemeGtk2::instance()->AddObserver(this);

[Evan Stade, 2014/04/24 01:14:52]

nit: ScopedObserver

[msw, 2014/04/24 18:32:00]

Done.

 }
 
 Gtk2Border::~Gtk2Border() {
-  gtk2_ui_->RemoveNativeThemeChangeObserver(this);
+  NativeThemeGtk2::instance()->RemoveObserver(this);
 }
 
 void Gtk2Border::Paint(const views::View& view, gfx::Canvas* canvas) {
@@ -144,7 +145,7 @@ gfx::Size Gtk2Border::GetMinimumSize() const {
   return gfx::Size(insets.width(), insets.height());
 }
 
-void Gtk2Border::OnNativeThemeChanged() {
+void Gtk2Border::OnNativeThemeUpdate() {
   for (int i = 0; i < kNumberOfFocusedStates; ++i) {
     for (int j = 0; j < views::Button::STATE_COUNT; ++j) {
       button_images_[i][j] = gfx::ImageSkia();