[Payments] Record use stats after payment request completion.

components/payments/core/payment_instrument.h

 // Copyright 2017 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_PAYMENTS_CORE_PAYMENT_INSTRUMENT_H_
 #define COMPONENTS_PAYMENTS_CORE_PAYMENT_INSTRUMENT_H_
 
 #include <set>
 #include <string>
 
@@ skipping 27 matching lines @@
   virtual void InvokePaymentApp(Delegate* delegate) = 0;
   // Returns whether the instrument is complete to be used as a payment method
   // without further editing.
   virtual bool IsCompleteForPayment() = 0;
   // Returns a message to indicate to the user what's missing for the instrument
   // to be complete for payment.
   virtual base::string16 GetMissingInfoLabel() = 0;
   // Returns whether the instrument is valid for the purposes of responding to
   // canMakePayment.
   virtual bool IsValidForCanMakePayment() = 0;
+  // Records the use of this payment instrument.
+  virtual void RecordUse() = 0;
 
   const std::string& method_name() const { return method_name_; }
   const base::string16& label() const { return label_; }
   const base::string16& sublabel() const { return sublabel_; }
   int icon_resource_id() const { return icon_resource_id_; }
   Type type() { return type_; }
 
  protected:
   PaymentInstrument(const std::string& method_name,
                     const base::string16& label,
                     const base::string16& sublabel,
                     int icon_resource_id,
                     Type type);
 
  private:
   const std::string method_name_;
   const base::string16 label_;
   const base::string16 sublabel_;
   int icon_resource_id_;
   Type type_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentInstrument);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CORE_PAYMENT_INSTRUMENT_H_