sync: Refactor per-datatype throttling

sync/engine/syncer_proto_util.h

 // Copyright (c) 2012 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 SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 #define SYNC_ENGINE_SYNCER_PROTO_UTIL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 15 matching lines @@
 }  // namespace sync_pb
 
 namespace browser_sync {
 
 namespace sessions {
 class SyncProtocolError;
 class SyncSessionContext;
 }
 
 class ClientToServerMessage;
+class ThrottledDataTypeTracker;
 class ServerConnectionManager;
 class SyncEntity;
 class CommitResponse_EntryResponse;
 
 class SyncerProtoUtil {
  public:
   // Posts the given message and fills the buffer with the returned value.
   // Returns true on success.  Also handles store birthday verification: will
   // produce a SyncError if the birthday is incorrect.
   static SyncerError PostClientToServerMessage(
@@ skipping 67 matching lines @@
   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);
 
   static void HandleThrottleError(const SyncProtocolError& error,
                                   const base::TimeTicks& throttled_until,
-                                  sessions::SyncSessionContext* context,
+                                  browser_sync::ThrottledDataTypeTracker* dttm,
                                   sessions::SyncSession::Delegate* delegate);
 
   friend class SyncerProtoUtilTest;
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, AddRequestBirthday);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, PostAndProcessHeaders);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, VerifyResponseBirthday);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingNoDatatypes);
   FRIEND_TEST_ALL_PREFIXES(SyncerProtoUtilTest, HandleThrottlingWithDatatypes);
 
   DISALLOW_COPY_AND_ASSIGN(SyncerProtoUtil);
 };
 
 }  // namespace browser_sync
 
 #endif  // SYNC_ENGINE_SYNCER_PROTO_UTIL_H_