[WebPayments] Move views-specific code to c/b/ui/views/

chrome/browser/payments/payment_request_impl.h

Index: chrome/browser/payments/payment_request_impl.h
diff --git a/chrome/browser/payments/payment_request_impl.h b/chrome/browser/payments/payment_request_impl.h
index fdc3d47558748d4a538065a5afc8245e1a01bdd9..d03d964153e51fef68533327d7da8bee8497e692 100644
--- a/chrome/browser/payments/payment_request_impl.h
+++ b/chrome/browser/payments/payment_request_impl.h
@@ -34,15 +34,19 @@ class PaymentRequestImpl : payments::mojom::PaymentRequest,
   void Complete(payments::mojom::PaymentComplete result) override {}
   void CanMakeActivePayment() override {}
 
+  void Cancel();
   void OnError();
 
+  content::WebContents* web_contents() { return web_contents_; }
+
  private:
   friend class base::RefCounted<PaymentRequestImpl>;
   ~PaymentRequestImpl() override;
 
   content::WebContents* web_contents_;
   mojo::Binding<payments::mojom::PaymentRequest> binding_;
-  PaymentRequestDialog* dialog_;
+  payments::mojom::PaymentRequestClientPtr client_;
+
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestImpl);
 };