Convert WindowOpenDisposition to an enum class.

extensions/browser/guest_view/extension_options/extension_options_guest.cc

Index: extensions/browser/guest_view/extension_options/extension_options_guest.cc
diff --git a/extensions/browser/guest_view/extension_options/extension_options_guest.cc b/extensions/browser/guest_view/extension_options/extension_options_guest.cc
index 6c9ff477ef1941b77eaf0e6bd5055c5e25675a97..c02aaceed03f4c72911c55a185f33cb21e62c482 100644
--- a/extensions/browser/guest_view/extension_options/extension_options_guest.cc
+++ b/extensions/browser/guest_view/extension_options/extension_options_guest.cc
@@ -168,14 +168,12 @@ WebContents* ExtensionOptionsGuest::OpenURLFromTab(
   // this guest view, change the disposition to NEW_FOREGROUND_TAB.
   if ((!params.url.SchemeIs(extensions::kExtensionScheme) ||
        params.url.host() != options_page_.host()) &&
-      params.disposition == CURRENT_TAB) {
+      params.disposition == WindowOpenDisposition::CURRENT_TAB) {
     return extension_options_guest_delegate_->OpenURLInNewTab(
-        content::OpenURLParams(params.url,
-                               params.referrer,
-                               params.frame_tree_node_id,
-                               NEW_FOREGROUND_TAB,
-                               params.transition,
-                               params.is_renderer_initiated));
+        content::OpenURLParams(
+            params.url, params.referrer, params.frame_tree_node_id,
+            WindowOpenDisposition::NEW_FOREGROUND_TAB, params.transition,
+            params.is_renderer_initiated));
   }
   return extension_options_guest_delegate_->OpenURLInNewTab(params);
 }
@@ -213,11 +211,9 @@ bool ExtensionOptionsGuest::ShouldCreateWebContents(
   //   ctrl-click or middle mouse button click
   if (extension_options_guest_delegate_) {
     extension_options_guest_delegate_->OpenURLInNewTab(
-        content::OpenURLParams(target_url,
-                               content::Referrer(),
-                               NEW_FOREGROUND_TAB,
-                               ui::PAGE_TRANSITION_LINK,
-                               false));
+        content::OpenURLParams(target_url, content::Referrer(),
+                               WindowOpenDisposition::NEW_FOREGROUND_TAB,
+                               ui::PAGE_TRANSITION_LINK, false));
   }
   return false;
 }