Remove autocheckout code.

components/autofill/content/browser/autocheckout_statistic.h

-// Copyright 2013 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 COMPONENTS_AUTOFILL_CONTENT_BROWSER_AUTOCHECKOUT_STATISTIC_H__
-#define COMPONENTS_AUTOFILL_CONTENT_BROWSER_AUTOCHECKOUT_STATISTIC_H__
-
-#include <vector>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/time/time.h"
-#include "components/autofill/content/browser/autocheckout_steps.h"
-
-namespace base {
-class DictionaryValue;
-}
-
-namespace autofill {
-
-// Per page statistics gathered in Autocheckout flow.
-struct AutocheckoutStatistic {
-  AutocheckoutStatistic();
-  ~AutocheckoutStatistic();
-
-  // Page number for which this statistic is being recorded.
-  int page_number;
-
-  // Autocheckout steps that are part of |page_number|.
-  std::vector<AutocheckoutStepType> steps;
-
-  // Time taken for performing |steps|, used for measuring latency.
-  base::TimeDelta time_taken;
-
-  // Helper method to convert AutocheckoutStatistic to json representation.
-  scoped_ptr<base::DictionaryValue> ToDictionary() const;
-};
-
-}  // namespace autofill
-
-#endif  // COMPONENTS_AUTOFILL_CONTENT_BROWSER_AUTOCHECKOUT_STATISTIC_H__