Notify ThemeService via callback when supervised user is ready.

chrome/browser/managed_mode/managed_user_service.h

Index: chrome/browser/managed_mode/managed_user_service.h
diff --git a/chrome/browser/managed_mode/managed_user_service.h b/chrome/browser/managed_mode/managed_user_service.h
index eb9c08f7cb9fefb224ed5c785ca3a17cce0dc683..6dc4b56bc41971c2f92017c8d0bf5685ef398bfe 100644
--- a/chrome/browser/managed_mode/managed_user_service.h
+++ b/chrome/browser/managed_mode/managed_user_service.h
@@ -144,6 +144,8 @@ class ManagedUserService : public BrowserContextKeyedService,
   void AddNavigationBlockedCallback(const NavigationBlockedCallback& callback);
   void DidBlockNavigation(content::WebContents* web_contents);
 
+  void AddInitCallback(const base::Closure& callback);
+
   // extensions::ManagementPolicy::Provider implementation:
   virtual std::string GetDebugPolicyProviderName() const OVERRIDE;
   virtual bool UserMayLoad(const extensions::Extension* extension,
@@ -257,6 +259,8 @@ class ManagedUserService : public BrowserContextKeyedService,
   bool waiting_for_sync_initialization_;
   bool is_profile_active_;
 
+  std::vector<base::Closure> init_callbacks_;
+
   std::vector<NavigationBlockedCallback> navigation_blocked_callbacks_;
 
   // Sets a profile in elevated state for testing if set to true.