[Sync] Removing duplicated includes between cc and h files.

components/sync/api/attachments/attachment_id.cc

 // Copyright 2014 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 "components/sync/api/attachments/attachment_id.h"
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include "base/logging.h"
 #include "components/sync/base/attachment_id_proto.h"
 #include "components/sync/protocol/sync.pb.h"
 
 namespace syncer {
 
 void AttachmentId::ImmutableAttachmentIdProtoTraits::InitializeWrapper(
     Wrapper* wrapper) {
   *wrapper = new sync_pb::AttachmentIdProto();
 }
@@ skipping 57 matching lines @@
 
 size_t AttachmentId::GetSize() const {
   return proto_.Get().size_bytes();
 }
 
 uint32_t AttachmentId::GetCrc32c() const {
   return proto_.Get().crc32c();
 }
 
 }  // namespace syncer