[Web Payments] Respect Harmony dialog width in Payment Request

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

Index: chrome/browser/ui/views/payments/payment_request_views_util.h
diff --git a/chrome/browser/ui/views/payments/payment_request_views_util.h b/chrome/browser/ui/views/payments/payment_request_views_util.h
index a6a2ef0473751488a294e5b9a3864b86b86e155f..92515391c381fcb733c7d5eea72fc8e260fe79b7 100644
--- a/chrome/browser/ui/views/payments/payment_request_views_util.h
+++ b/chrome/browser/ui/views/payments/payment_request_views_util.h
@@ -37,7 +37,6 @@ constexpr int kPaymentRequestRowExtraRightInset = 8;
 constexpr int kPaymentRequestButtonSpacing = 10;
 
 // Dimensions of the dialog itself.
-constexpr int kDialogWidth = 450;
 constexpr int kDialogHeight = 450;
 
 enum class PaymentRequestCommonTags {
@@ -50,6 +49,8 @@ enum class PaymentRequestCommonTags {
   PAYMENT_REQUEST_COMMON_TAG_MAX
 };
 
+int GetActualDialogWidth();
+
 // Creates and returns a header for all the sheets in the PaymentRequest dialog.
 // The header contains an optional back arrow button (if |show_back_arrow| is
 // true), a |title| label. |delegate| becomes the delegate for the back and