Server directed error handling backend code.

chrome/browser/sync/engine/sync_scheduler.h

Index: chrome/browser/sync/engine/sync_scheduler.h
diff --git a/chrome/browser/sync/engine/sync_scheduler.h b/chrome/browser/sync/engine/sync_scheduler.h
index 7a025fb0478b05d9f48d6417c6334e2cbc47e39d..89864c2d4ae205f8ac93e0b77d8b4376671e8953 100644
--- a/chrome/browser/sync/engine/sync_scheduler.h
+++ b/chrome/browser/sync/engine/sync_scheduler.h
@@ -116,6 +116,7 @@ class SyncScheduler : public sessions::SyncSession::Delegate,
   virtual void OnReceivedSessionsCommitDelay(
       const base::TimeDelta& new_delay) OVERRIDE;
   virtual void OnShouldStopSyncingPermanently() OVERRIDE;
+  virtual void OnSyncError(sessions::SyncSession* session) OVERRIDE;
 
   // ServerConnectionEventListener implementation.
   // TODO(tim): schedule a nudge when valid connection detected? in 1 minute?
@@ -348,6 +349,10 @@ class SyncScheduler : public sessions::SyncSession::Delegate,
   // the client starts up and does not need to perform an initial sync.
   void SendInitialSnapshot();
 
+  virtual void OnRequestEarlyExit();
+  virtual void OnActionableError(sessions::SyncSession* session);
+
+
   ScopedRunnableMethodFactory<SyncScheduler> method_factory_;
 
   // Used for logging.