[Payments] Improve the closing of the PR dialog.

chrome/browser/ui/browser_dialogs.h

Index: chrome/browser/ui/browser_dialogs.h
diff --git a/chrome/browser/ui/browser_dialogs.h b/chrome/browser/ui/browser_dialogs.h
index 6d2df0169030a256d3899b473bd0899e5bc1b1ff..58befd474c14f21f78e839d93ccfb41115666dec 100644
--- a/chrome/browser/ui/browser_dialogs.h
+++ b/chrome/browser/ui/browser_dialogs.h
@@ -50,6 +50,7 @@ class URLRequest;
 
 namespace payments {
 class PaymentRequest;
+class PaymentRequestDialog;
 }
 
 namespace security_state {
@@ -150,7 +151,8 @@ void ShowBookmarkEditorViews(gfx::NativeWindow parent_window,
                              const BookmarkEditor::EditDetails& details,
                              BookmarkEditor::Configuration configuration);
 
-void ShowPaymentRequestDialog(payments::PaymentRequest* request);
+payments::PaymentRequestDialog* CreatePaymentRequestDialog(
+    payments::PaymentRequest* request);
 
 #if defined(OS_MACOSX)