Notify ThemeService via callback when supervised user is ready.

chrome/browser/ui/gtk/gtk_theme_service.cc

Index: chrome/browser/ui/gtk/gtk_theme_service.cc
diff --git a/chrome/browser/ui/gtk/gtk_theme_service.cc b/chrome/browser/ui/gtk/gtk_theme_service.cc
index 76befd6661be937399eacb7a37ab859e3e59f917..97e0ec59387c5c3d8a00783667c0eabef9361289 100644
--- a/chrome/browser/ui/gtk/gtk_theme_service.cc
+++ b/chrome/browser/ui/gtk/gtk_theme_service.cc
@@ -17,6 +17,7 @@
 #include "base/stl_util.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/themes/custom_theme_supplier.h"
 #include "chrome/browser/themes/theme_properties.h"
 #include "chrome/browser/themes/theme_service_factory.h"
 #include "chrome/browser/ui/browser.h"
@@ -347,6 +348,7 @@ void GtkThemeService::InitThemesFor(content::NotificationObserver* observer) {
 
 void GtkThemeService::SetTheme(const extensions::Extension* extension) {
   profile()->GetPrefs()->SetBoolean(prefs::kUsesSystemTheme, false);
+  use_gtk_ = false;
   LoadDefaultValues();
   ThemeService::SetTheme(extension);
 }
@@ -370,6 +372,14 @@ bool GtkThemeService::UsingDefaultTheme() const {
   return !use_gtk_ && ThemeService::UsingDefaultTheme();
 }
 
+void GtkThemeService::SetCustomDefaultTheme(
+    scoped_refptr<CustomThemeSupplier> theme_supplier) {
+  profile()->GetPrefs()->SetBoolean(prefs::kUsesSystemTheme, false);
+  use_gtk_ = false;
+  LoadDefaultValues();
+  ThemeService::SetCustomDefaultTheme(theme_supplier);
+}
+
 bool GtkThemeService::ShouldInitWithNativeTheme() const {
   return profile()->GetPrefs()->GetBoolean(prefs::kUsesSystemTheme);
 }