Sync: Add a SyncTypePreferenceProvider interface.

chrome/browser/supervised_user/supervised_user_service.h

Index: chrome/browser/supervised_user/supervised_user_service.h
diff --git a/chrome/browser/supervised_user/supervised_user_service.h b/chrome/browser/supervised_user/supervised_user_service.h
index a92e34d257f1748e58cd50a390d91a3f71b9fed8..3ffd01e99b814c7564f3ecd33d80d5c534faf419 100644
--- a/chrome/browser/supervised_user/supervised_user_service.h
+++ b/chrome/browser/supervised_user/supervised_user_service.h
@@ -16,6 +16,7 @@
 #include "base/strings/string16.h"
 #include "chrome/browser/supervised_user/supervised_user_url_filter.h"
 #include "chrome/browser/supervised_user/supervised_users.h"
+#include "chrome/browser/sync/profile_sync_service_data_type_provider.h"
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/ui/browser_list_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
@@ -51,6 +52,7 @@ class SupervisedUserService : public KeyedService,
                               public extensions::ManagementPolicy::Provider,
                               public extensions::ExtensionRegistryObserver,
 #endif
+                              public ProfileSyncServiceDataTypeProvider,
                               public ProfileSyncServiceObserver,
                               public chrome::BrowserListObserver {
  public:
@@ -172,6 +174,9 @@ class SupervisedUserService : public KeyedService,
       extensions::UnloadedExtensionInfo::Reason reason) OVERRIDE;
 #endif
 
+  // ProfileSyncServiceDataTypeProvider implementation:
+  virtual syncer::ModelTypeSet GetRequiredSyncDataTypes() OVERRIDE;
+
   // ProfileSyncServiceObserver implementation:
   virtual void OnStateChanged() OVERRIDE;