Add the navigation redirect-chain to Sync sessions proto for offline analysis.

sync/protocol/proto_value_conversions.h

Index: sync/protocol/proto_value_conversions.h
diff --git a/sync/protocol/proto_value_conversions.h b/sync/protocol/proto_value_conversions.h
index e6c9aaff3cc8c735d468a39371eed8517e04a007..443303e837bf90169865635c1e2ea925c823ecfa 100644
--- a/sync/protocol/proto_value_conversions.h
+++ b/sync/protocol/proto_value_conversions.h
@@ -50,6 +50,7 @@ class Media;
 class ManagedUserSettingSpecifics;
 class ManagedUserSharedSettingSpecifics;
 class ManagedUserSpecifics;
+class NavigationRedirect;
 class NigoriSpecifics;
 class PasswordSpecifics;
 class PasswordSpecificsData;
@@ -118,6 +119,9 @@ SYNC_EXPORT_PRIVATE base::DictionaryValue* SessionWindowToValue(
 SYNC_EXPORT_PRIVATE base::DictionaryValue* TabNavigationToValue(
     const sync_pb::TabNavigation& tab_navigation);
 
+SYNC_EXPORT_PRIVATE base::DictionaryValue* NavigationRedirectToValue(
+    const sync_pb::NavigationRedirect& navigation_redirect);
+
 // Sub-protocol of PasswordSpecifics.
 
 SYNC_EXPORT_PRIVATE base::DictionaryValue* PasswordSpecificsDataToValue(