Notify ThemeService via callback when supervised user is ready.

chrome/browser/ui/gtk/gtk_theme_service.h

Index: chrome/browser/ui/gtk/gtk_theme_service.h
diff --git a/chrome/browser/ui/gtk/gtk_theme_service.h b/chrome/browser/ui/gtk/gtk_theme_service.h
index 18a840eab41c9794f8887eda50471e59874f5835..41d4140dd0648d99ff7ce7ffbb50971f5d169523 100644
--- a/chrome/browser/ui/gtk/gtk_theme_service.h
+++ b/chrome/browser/ui/gtk/gtk_theme_service.h
@@ -18,6 +18,7 @@
 #include "ui/base/gtk/owned_widget_gtk.h"
 #include "ui/gfx/color_utils.h"
 
+class CustomThemeSupplier;
 class Profile;
 
 namespace content {
@@ -75,6 +76,8 @@ class GtkThemeService : public ThemeService {
   virtual SkColor GetColor(int id) const OVERRIDE;
   virtual bool HasCustomImage(int id) const OVERRIDE;
   virtual void SetTheme(const extensions::Extension* extension) OVERRIDE;
+  virtual void SetCustomDefaultTheme(
+      scoped_refptr<CustomThemeSupplier> theme_supplier) OVERRIDE;
   virtual void UseDefaultTheme() OVERRIDE;
   virtual void SetNativeTheme() OVERRIDE;
   virtual bool UsingDefaultTheme() const OVERRIDE;