Make the throttle delay configurable by the server.

chrome/browser/sync/engine/syncer_proto_util.h

 // Copyright (c) 2006-2008 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.
 
 #ifndef CHROME_BROWSER_SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 #define CHROME_BROWSER_SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 97 matching lines @@
       const sync_pb::ClientToServerResponse* response,
       sessions::SyncSession* session);
 
   // Post the message using the scm, and do some processing on the returned
   // headers. Decode the server response.
   static bool PostAndProcessHeaders(browser_sync::ServerConnectionManager* scm,
                                     sessions::SyncSession* session,
                                     const ClientToServerMessage& msg,
                                     sync_pb::ClientToServerResponse* response);
 
+  static base::TimeDelta GetThrottleDelay(
+      const sync_pb::ClientToServerResponse& response);
+
   friend class SyncerProtoUtilTest;
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, AddRequestBirthday);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, PostAndProcessHeaders);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, VerifyResponseBirthday);
 
   DISALLOW_COPY_AND_ASSIGN(SyncerProtoUtil);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_ENGINE_SYNCER_PROTO_UTIL_H_