Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.cc
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
index fa395cfda3ef4ccc8c0768d50b3a6e2d1b1dcb3b..81b89e76e23e6ba9916e6e047991a4081540772c 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.cc
@@ -1138,12 +1138,10 @@ void PrintPreviewHandler::HandleManageCloudPrint(
     return;
   if (!user.empty())
     manage_url = net::AppendQueryParameter(manage_url, "user", user);
-  preview_web_contents()->OpenURL(content::OpenURLParams(
-      manage_url,
-      content::Referrer(),
-      NEW_FOREGROUND_TAB,
-      ui::PAGE_TRANSITION_LINK,
-      false));
+  preview_web_contents()->OpenURL(
+      content::OpenURLParams(manage_url, content::Referrer(),
+                             WindowOpenDisposition::NEW_FOREGROUND_TAB,
+                             ui::PAGE_TRANSITION_LINK, false));
 }
 
 #if defined(ENABLE_BASIC_PRINTING)