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

components/sync/engine/cycle/commit_counters.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/engine/cycle/commit_counters.h"
 
 #include "base/json/json_string_value_serializer.h"
-#include "base/values.h"
 
 namespace syncer {
 
 CommitCounters::CommitCounters()
     : num_commits_attempted(0),
       num_commits_success(0),
       num_commits_conflict(0),
       num_commits_error(0) {}
 
 CommitCounters::~CommitCounters() {}
 
 std::unique_ptr<base::DictionaryValue> CommitCounters::ToValue() const {
   std::unique_ptr<base::DictionaryValue> value(new base::DictionaryValue());
   value->SetInteger("numCommitsAttempted", num_commits_attempted);
   value->SetInteger("numCommitsSuccess", num_commits_success);
   value->SetInteger("numCommitsConflict", num_commits_conflict);
   value->SetInteger("numCommitsError", num_commits_error);
   return value;
 }
 
 std::string CommitCounters::ToString() const {
   std::string result;
   std::unique_ptr<base::DictionaryValue> value = ToValue();
   JSONStringValueSerializer serializer(&result);
   serializer.Serialize(*value);
   return result;
 }
 
 }  // namespace syncer