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 5deb3609b7ac54b8941a74f14b3c58458eaa2531..1c0c9f999752411cb358c5bf4f7f63413101a203 100644
--- a/chrome/browser/sync/engine/sync_scheduler.h
+++ b/chrome/browser/sync/engine/sync_scheduler.h
@@ -120,6 +120,8 @@ class SyncScheduler : public sessions::SyncSession::Delegate,
   virtual void OnReceivedSessionsCommitDelay(
       const base::TimeDelta& new_delay) OVERRIDE;
   virtual void OnShouldStopSyncingPermanently() OVERRIDE;
+  virtual void OnSyncProtocolError(
+      const sessions::SyncSessionSnapshot& snapshot) OVERRIDE;
 
   // ServerConnectionEventListener implementation.
   // TODO(tim): schedule a nudge when valid connection detected? in 1 minute?
@@ -352,6 +354,9 @@ class SyncScheduler : public sessions::SyncSession::Delegate,
   // the client starts up and does not need to perform an initial sync.
   void SendInitialSnapshot();
 
+  virtual void OnActionableError(const sessions::SyncSessionSnapshot& snapshot);
+
+
   ScopedRunnableMethodFactory<SyncScheduler> method_factory_;
 
   // Used for logging.