[Web Payments] Implement the CVC Unmask dialog.

components/payments/core/payment_request_delegate.h

Index: components/payments/core/payment_request_delegate.h
diff --git a/components/payments/content/payment_request_delegate.h b/components/payments/core/payment_request_delegate.h
similarity index 78%
rename from components/payments/content/payment_request_delegate.h
rename to components/payments/core/payment_request_delegate.h
index 98040a6aa575dc3d1de708ffcd1ec7e0841cf2d4..1465d9b3fdf94fe8ef071e4404786899a6c1cfb6 100644
--- a/components/payments/content/payment_request_delegate.h
+++ b/components/payments/core/payment_request_delegate.h
@@ -7,7 +7,11 @@
 
 #include <string>
 
+#include "base/memory/weak_ptr.h"
+#include "components/autofill/core/browser/payments/full_card_request.h"
+
 namespace autofill {
+class CreditCard;
 class PersonalDataManager;
 }
 
@@ -38,6 +42,12 @@ class PaymentRequestDelegate {
 
   // Returns whether the user is in Incognito mode.
   virtual bool IsIncognito() const = 0;
+
+  // Starts a FullCardRequest to unmask |credit_card|.
+  virtual void DoFullCardRequest(
+      const autofill::CreditCard& credit_card,
+      base::WeakPtr<autofill::payments::FullCardRequest::ResultDelegate>
+          result_delegate) = 0;
 };
 
 }  // namespace payments