Track merged nudge sources

sync/internal_api/public/sessions/sync_session_snapshot.h

Index: sync/internal_api/public/sessions/sync_session_snapshot.h
diff --git a/sync/internal_api/public/sessions/sync_session_snapshot.h b/sync/internal_api/public/sessions/sync_session_snapshot.h
index c6b3c78b625a3c45b8169139952055255622a193..1008f918f067a007b2419053c28ec51186f58ece 100644
--- a/sync/internal_api/public/sessions/sync_session_snapshot.h
+++ b/sync/internal_api/public/sessions/sync_session_snapshot.h
@@ -39,6 +39,7 @@ class SyncSessionSnapshot {
       int num_hierarchy_conflicts,
       int num_server_conflicts,
       const SyncSourceInfo& source,
+      const std::vector<SyncSourceInfo>& merged_sources_log,
       bool notifications_enabled,
       size_t num_entries,
       base::Time sync_start_time,
@@ -63,6 +64,7 @@ class SyncSessionSnapshot {
   int num_hierarchy_conflicts() const;
   int num_server_conflicts() const;
   SyncSourceInfo source() const;
+  const std::vector<SyncSourceInfo>& merged_sources_log() const;
   bool notifications_enabled() const;
   size_t num_entries() const;
   base::Time sync_start_time() const;
@@ -82,6 +84,7 @@ class SyncSessionSnapshot {
   int num_hierarchy_conflicts_;
   int num_server_conflicts_;
   SyncSourceInfo source_;
+  std::vector<SyncSourceInfo> merged_sources_log_;
   bool notifications_enabled_;
   size_t num_entries_;
   base::Time sync_start_time_;