[Web Payments] Prettify the payment sheet rows in some states.

chrome/browser/ui/views/payments/payment_request_row_view.h

Index: chrome/browser/ui/views/payments/payment_request_row_view.h
diff --git a/chrome/browser/ui/views/payments/payment_request_row_view.h b/chrome/browser/ui/views/payments/payment_request_row_view.h
index e331d1e560f9214f8a2f23f3dd3f4a284720b20f..e9829db41cbf030cb48498805878cfd750bb41f7 100644
--- a/chrome/browser/ui/views/payments/payment_request_row_view.h
+++ b/chrome/browser/ui/views/payments/payment_request_row_view.h
@@ -14,13 +14,17 @@ namespace payments {
 // darkens on hover and displays a horizontal ruler on its lower bound.
 class PaymentRequestRowView : public views::CustomButton {
  public:
-  explicit PaymentRequestRowView(views::ButtonListener* listener);
+  // Creates a row view. If |clickable| is true, the row will be shaded on hover
+  // and handle click events.
+  PaymentRequestRowView(views::ButtonListener* listener, bool clickable);
   ~PaymentRequestRowView() override;
 
   // views::CustomButton:
   void StateChanged(ButtonState old_state) override;
 
  private:
+  bool clickable_;
+
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestRowView);
 };