[Sync] ApplySyncChanges autofill implementation.

components/autofill/core/browser/webdata/autofill_entry.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_CORE_BROWSER_WEBDATA_AUTOFILL_ENTRY_H__
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_ENTRY_H__
 
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 
@@ skipping 13 matching lines @@
   bool operator==(const AutofillKey& key) const;
   bool operator<(const AutofillKey& key) const;
 
  private:
   base::string16 name_;
   base::string16 value_;
 };
 
 class AutofillEntry {
  public:
+  AutofillEntry();
   AutofillEntry(const AutofillKey& key,
                 const base::Time& date_created,
                 const base::Time& date_last_used);
   ~AutofillEntry();
 
   const AutofillKey& key() const { return key_; }
   const base::Time& date_created() const { return date_created_; }
   const base::Time& date_last_used() const { return date_last_used_; }
 
   bool operator==(const AutofillEntry& entry) const;
+  bool operator!=(const AutofillEntry& entry) const;
   bool operator<(const AutofillEntry& entry) const;
 
  private:
   AutofillKey key_;
   base::Time date_created_;
   base::Time date_last_used_;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_ENTRY_H__