[Sync] Replace TalkMediator*/MediatorThread* with PushClient

sync/syncable/syncable.cc

 // 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.
 
 #include "sync/syncable/syncable.h"
 
 #include <algorithm>
 #include <cstring>
 #include <functional>
 #include <iomanip>
@@ skipping 12 matching lines @@
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/perftimer.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "sync/protocol/proto_value_conversions.h"
-#include "sync/protocol/service_constants.h"
 #include "sync/syncable/directory_backing_store.h"
 #include "sync/syncable/directory_change_delegate.h"
 #include "sync/syncable/in_memory_directory_backing_store.h"
 #include "sync/syncable/model_type.h"
 #include "sync/syncable/on_disk_directory_backing_store.h"
 #include "sync/syncable/syncable-inl.h"
 #include "sync/syncable/syncable_changes_version.h"
 #include "sync/syncable/syncable_columns.h"
 #include "sync/syncable/syncable_enum_conversions.h"
 #include "sync/syncable/transaction_observer.h"
@@ skipping 2326 matching lines @@
     if (entry->ref(NEXT_ID).IsRoot() ||
         entry->ref(NEXT_ID) != entry->ref(PREV_ID)) {
       return entry;
     }
   }
   // There were no children in the linked list.
   return NULL;
 }
 
 }  // namespace syncable