Autofill saves duplicate profiles and credit card info in preferences

chrome/browser/autofill/autofill-inl.h

+// Copyright (c) 2010 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 CHROME_BROWSER_AUTOFILL_AUTOFILL_INL_H_
+#define CHROME_BROWSER_AUTOFILL_AUTOFILL_INL_H_
+#pragma once
+
+template<typename T>
+class FormGroupMatchesByCompareFunctor {
+ public:
+  explicit FormGroupMatchesByCompareFunctor(const T& form_group)
+      : form_group_(form_group) {
+  }
+
+  bool operator()(const T* form_group) {
+    return form_group->Compare(form_group_) == 0;
+  }
+
+  bool operator()(const T& form_group) {
+    return form_group.Compare(form_group_) == 0;
+  }
+
+ private:
+  const T& form_group_;
+};
+
+template<typename C, typename T>
+bool FindByContents(const C& container, const T& form_group) {
+  return std::find_if(
+      container.begin(),
+      container.end(),
+      FormGroupMatchesByCompareFunctor<T>(form_group)) != container.end();
+}
+
+#endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_INL_H_