Prevent existing card number to be used for new credit cards in the Payment Request

components/autofill/core/browser/personal_data_manager.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_PERSONAL_DATA_MANAGER_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_PERSONAL_DATA_MANAGER_H_
 
 #include <list>
 #include <memory>
 #include <set>
@@ skipping 166 matching lines @@
   // Deletes all server profiles and cards (both masked and unmasked).
   void ClearAllServerData();
 
   // Sets a server credit card for test.
   void AddServerCreditCardForTest(std::unique_ptr<CreditCard> credit_card);
 
   // Returns the credit card with the specified |guid|, or nullptr if there is
   // no credit card with the specified |guid|.
   virtual CreditCard* GetCreditCardByGUID(const std::string& guid);
 
+  // Returns the credit card with the specified |number|, or nullptr if there is
+  // no credit card with the specified |number|.
+  virtual CreditCard* GetCreditCardByNumber(const std::string& number);
+
   // Gets the field types availabe in the stored address and credit card data.
   void GetNonEmptyTypes(ServerFieldTypeSet* non_empty_types);
 
   // Returns true if the credit card information is stored with a password.
   bool HasPassword();
 
   // Returns whether the personal data has been loaded from the web database.
   virtual bool IsDataLoaded() const;
 
   // This PersonalDataManager owns these profiles and credit cards.  Their
@@ skipping 417 matching lines @@
   // The context for the request to be used to fetch libaddressinput's address
   // validation rules.
   scoped_refptr<net::URLRequestContextGetter> context_getter_;
 
   DISALLOW_COPY_AND_ASSIGN(PersonalDataManager);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_PERSONAL_DATA_MANAGER_H_