sync: Remove SyncSourceInfo

sync/sessions/ordered_commit_set.h

Index: sync/sessions/ordered_commit_set.h
diff --git a/sync/sessions/ordered_commit_set.h b/sync/sessions/ordered_commit_set.h
index 862ee23751bfa4e766e21a073a1454d93e21d932..ae99dcd942f6105a085141806e5b071dad2648c8 100644
--- a/sync/sessions/ordered_commit_set.h
+++ b/sync/sessions/ordered_commit_set.h
@@ -75,6 +75,11 @@ class SYNC_EXPORT_PRIVATE OrderedCommitSet {
     return Size() == 0;
   }
 
+  // Returns all the types that are included in this list.
+  ModelTypeSet Types() const {
+    return types_in_list_;
+  }
+
   // Returns true iff any of the commit ids added to this set have model type
   // BOOKMARKS.
   bool HasBookmarkCommitId() const;
@@ -115,6 +120,9 @@ class SYNC_EXPORT_PRIVATE OrderedCommitSet {
   // and shouldn't take up too much extra space since commit lists are small.
   std::vector<ModelType> types_;
 
+  // The set of types which are included in this particular list.
+  ModelTypeSet types_in_list_;
+
   ModelSafeRoutingInfo routes_;
 };