[Sync] Tidy up SyncBackendHost interface.

chrome/browser/sync/profile_sync_service.h

Index: chrome/browser/sync/profile_sync_service.h
diff --git a/chrome/browser/sync/profile_sync_service.h b/chrome/browser/sync/profile_sync_service.h
index 9b2e98d30a994c042f180ac6270f0ef935e36e2c..4cfd708b10e3f6a817408c381d5cb91f7693de25 100644
--- a/chrome/browser/sync/profile_sync_service.h
+++ b/chrome/browser/sync/profile_sync_service.h
@@ -185,6 +185,8 @@ class ProfileSyncService : public browser_sync::SyncFrontend,
   virtual void OnClearServerDataFailed();
   virtual void OnClearServerDataTimeout();
   virtual void OnClearServerDataSucceeded();
+  virtual void OnPassphraseRequired(bool for_decryption);
+  virtual void OnPassphraseAccepted();
 
   // Called when a user enters credentials through UI.
   virtual void OnUserSubmittedAuth(const std::string& username,
@@ -465,6 +467,8 @@ class ProfileSyncService : public browser_sync::SyncFrontend,
   // Sets the last synced time to the current time.
   void UpdateLastSyncedTime();
 
+  void NotifyObservers();
+
   static const char* GetPrefNameForDataType(syncable::ModelType data_type);
 
   // Time at which we begin an attempt a GAIA authorization.