[Sync] Fix sync lint errors/includes, update presubmit.

components/sync/protocol/proto_memory_estimations.cc

 // Copyright (c) 2016 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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "components/sync/protocol/proto_memory_estimations.h"
 
+#include <string>
+
 #include "base/trace_event/memory_usage_estimator.h"
 #include "components/sync/protocol/proto_visitors.h"
 
 namespace {
 
 // This class is a VisitProtoFields()-compatible visitor that estimates
 // proto's memory usage:
 //
 //  MemoryUsageVisitor visitor;
 //  VisitProtoFields(visitor, proto);
@@ skipping 98 matching lines @@
 // Explicit instantiations
 
 #define INSTANTIATE(Proto) \
   template size_t EstimateMemoryUsage<Proto>(const Proto&);
 
 INSTANTIATE(EntitySpecifics)
 INSTANTIATE(AttachmentMetadata)
 INSTANTIATE(DataTypeContext)
 
 }  // namespace sync_pb