Remove syncer::IncomingInvalidationSource

sync/notifier/p2p_invalidator.h

Index: sync/notifier/p2p_invalidator.h
diff --git a/sync/notifier/p2p_invalidator.h b/sync/notifier/p2p_invalidator.h
index d3faa66c5e8731d1b8cc190a77474d7891545d6a..cfb96449572294cb18eccf232f52739d1e9a6331 100644
--- a/sync/notifier/p2p_invalidator.h
+++ b/sync/notifier/p2p_invalidator.h
@@ -57,8 +57,7 @@ class SYNC_EXPORT_PRIVATE P2PNotificationData {
   P2PNotificationData();
   P2PNotificationData(const std::string& sender_id,
                       P2PNotificationTarget target,
-                      const ObjectIdInvalidationMap& invalidation_map,
-                      IncomingInvalidationSource source);
+                      const ObjectIdInvalidationMap& invalidation_map);
 
   ~P2PNotificationData();
 
@@ -67,8 +66,6 @@ class SYNC_EXPORT_PRIVATE P2PNotificationData {
 
   const ObjectIdInvalidationMap& GetIdInvalidationMap() const;
 
-  IncomingInvalidationSource GetSource() const;
-
   bool Equals(const P2PNotificationData& other) const;
 
   std::string ToString() const;
@@ -84,8 +81,6 @@ class SYNC_EXPORT_PRIVATE P2PNotificationData {
   P2PNotificationTarget target_;
   // The invalidation map for the notification.
   ObjectIdInvalidationMap invalidation_map_;
-  // The source of the invalidation.
-  IncomingInvalidationSource source_;
 };
 
 class SYNC_EXPORT_PRIVATE P2PInvalidator