Add first implemenation for SU password sync

chrome/browser/chromeos/login/supervised_user_manager.h

Index: chrome/browser/chromeos/login/supervised_user_manager.h
diff --git a/chrome/browser/chromeos/login/supervised_user_manager.h b/chrome/browser/chromeos/login/supervised_user_manager.h
index 4b116a8118a98b9075856d6637a9af2032c39606..7fb88b9dee9de097fa608e3173077b9f6466519e 100644
--- a/chrome/browser/chromeos/login/supervised_user_manager.h
+++ b/chrome/browser/chromeos/login/supervised_user_manager.h
@@ -15,6 +15,13 @@ class PrefRegistrySimple;
 namespace chromeos {
 
 class User;
+class SupervisedUserAuthentication;
+
+extern const char kSchemaVersion[];
+extern const char kPasswordRevision[];
+extern const char kSalt[];
+extern const char kEncryptedPassword[];
+extern const int kMinPasswordRevision;
 
 // Base class for SupervisedUserManagerImpl - provides a mechanism for getting
 // and setting specific values for supervised users, as well as additional
@@ -81,6 +88,20 @@ class SupervisedUserManager {
   // Remove locally managed user creation transaction record.
   virtual void CommitCreationTransaction() = 0;
 
+  // Return object that handles specifics of supervised user authentication.
+  virtual SupervisedUserAuthentication* GetAuthentication() = 0;
+
+  // Fill |result| with public password-specific data for |user_id| from Local
+  // State.
+  virtual void GetPasswordInformation(const std::string& user_id,
+                                      base::DictionaryValue* result) = 0;
+
+  // Stores public password-specific data from |password_info| for |user_id| in
+  // Local State.
+  virtual void SetPasswordInformation(
+      const std::string& user_id,
+      const base::DictionaryValue* password_info) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(SupervisedUserManager);
 };