[Web Payments] Implement the CVC Unmask dialog.

chrome/browser/payments/chrome_payment_request_delegate.h

Index: chrome/browser/payments/chrome_payment_request_delegate.h
diff --git a/chrome/browser/payments/chrome_payment_request_delegate.h b/chrome/browser/payments/chrome_payment_request_delegate.h
index 9d955bf5ceb332195c21b7c8fe58bf34cd0ee39b..8f84e56896cbfbbbc5ef7960e40b7f8138ad8962 100644
--- a/chrome/browser/payments/chrome_payment_request_delegate.h
+++ b/chrome/browser/payments/chrome_payment_request_delegate.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_PAYMENTS_CHROME_PAYMENT_REQUEST_DELEGATE_H_
 #define CHROME_BROWSER_PAYMENTS_CHROME_PAYMENT_REQUEST_DELEGATE_H_
 
+#include <string>
+
 #include "base/macros.h"
 #include "components/payments/content/payment_request_delegate.h"
 
@@ -14,7 +16,6 @@ class WebContents;
 
 namespace payments {
 
-class PaymentRequest;
 class PaymentRequestDialog;
 
 class ChromePaymentRequestDelegate : public PaymentRequestDelegate {
@@ -22,12 +23,20 @@ class ChromePaymentRequestDelegate : public PaymentRequestDelegate {
   explicit ChromePaymentRequestDelegate(content::WebContents* web_contents);
   ~ChromePaymentRequestDelegate() override {}
 
+  // PaymentRequestDelegate:
   void ShowDialog(PaymentRequest* request) override;
   void CloseDialog() override;
   void ShowErrorMessage() override;
   autofill::PersonalDataManager* GetPersonalDataManager() override;
   const std::string& GetApplicationLocale() const override;
   bool IsIncognito() const override;
+  content::WebContents* GetWebContents() override;
+
+  // AutofillPaymentInstrument::FullCardRequestDelegate:
+  void DoFullCardRequest(
+      const autofill::CreditCard& credit_card,
+      base::WeakPtr<autofill::payments::FullCardRequest::ResultDelegate>
+          result_delegate) override;
 
  protected:
   // Reference to the dialog so that we can satisfy calls to CloseDialog(). This