sync: Count and report reflected updates

sync/sessions/session_state.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The 'sessions' namespace comprises all the pieces of state that are
 // combined to form a SyncSession instance. In that way, it can be thought of
 // as an extension of the SyncSession type itself. Session scoping gives
 // context to things like "conflict progress", "update progress", etc, and the
 // separation this file provides allows clients to only include the parts they
 // need rather than the entire session stack.
@@ skipping 54 matching lines @@
 
   // True when we get such an INVALID_STORE error from the server.
   bool invalid_store;
   int num_successful_commits;
   // This is needed for monitoring extensions activity.
   int num_successful_bookmark_commits;
 
   // Download event counters.
   int num_updates_downloaded_total;
   int num_tombstone_updates_downloaded_total;
+  int num_echo_updates_downloaded_total;
 
   // If the syncer encountered a MIGRATION_DONE code, these are the types that
   // the client must now "migrate", by purging and re-downloading all updates.
   syncable::ModelTypeSet types_needing_local_migration;
 
   // Overwrites due to conflict resolution counters.
   int num_local_overwrites;
   int num_server_overwrites;
 };
 
@@ skipping 235 matching lines @@
   ~PerModelSafeGroupState();
 
   UpdateProgress update_progress;
   ConflictProgress conflict_progress;
 };
 
 }  // namespace sessions
 }  // namespace browser_sync
 
 #endif  // SYNC_SESSIONS_SESSION_STATE_H_