[Web Payments] Implement the CVC Unmask dialog.

components/payments/content/payment_request_delegate.h

Index: components/payments/content/payment_request_delegate.h
diff --git a/components/payments/content/payment_request_delegate.h b/components/payments/content/payment_request_delegate.h
index 98040a6aa575dc3d1de708ffcd1ec7e0841cf2d4..a4ec8f21747eae863113fc4b6a001d456c4834a7 100644
--- a/components/payments/content/payment_request_delegate.h
+++ b/components/payments/content/payment_request_delegate.h
@@ -7,6 +7,11 @@
 
 #include <string>
 
+#include "base/memory/weak_ptr.h"
+#include "components/autofill/core/browser/autofill_client.h"
+#include "components/autofill/core/browser/payments/full_card_request.h"
+#include "components/payments/core/autofill_payment_instrument.h"

[please use gerrit instead, 2017/03/30 13:14:09]

Why are weak_ptr, autofill_client, and autofill_payment_instrument included in
here? I do not see them being used below.

[anthonyvd, 2017/03/30 15:43:41]

Good catch, this code changed a lot while writing it and I forgot to remove
those after they became unused.

+
 namespace autofill {
 class PersonalDataManager;
 }
@@ -15,7 +20,8 @@ namespace payments {
 
 class PaymentRequest;
 
-class PaymentRequestDelegate {
+class PaymentRequestDelegate
+    : public AutofillPaymentInstrument::FullCardRequestDelegate {
  public:
   virtual ~PaymentRequestDelegate() {}