Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
index 169beadc9fc97b9c0c270ec4b2a343425fd87655..88b942292138986d78841cf3901a03879c645b5d 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
@@ -122,9 +122,9 @@ const NSUInteger kMaximumMenuPixelsWide = 300;
 
   chrome::OpenAll(NULL, browser, node, disposition, browser->profile());
 
-  if (disposition == NEW_FOREGROUND_TAB) {
+  if (disposition == WindowOpenDisposition::NEW_FOREGROUND_TAB) {
     content::RecordAction(UserMetricsAction("OpenAllBookmarks"));
-  } else if (disposition == NEW_WINDOW) {
+  } else if (disposition == WindowOpenDisposition::NEW_WINDOW) {
     content::RecordAction(UserMetricsAction("OpenAllBookmarksNewWindow"));
   } else {
     content::RecordAction(
@@ -144,15 +144,18 @@ const NSUInteger kMaximumMenuPixelsWide = 300;
 }
 
 - (IBAction)openAllBookmarks:(id)sender {
-  [self openAll:[sender tag] withDisposition:NEW_FOREGROUND_TAB];
+  WindowOpenDisposition disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
+  [self openAll:[sender tag] withDisposition:disposition];
 }
 
 - (IBAction)openAllBookmarksNewWindow:(id)sender {
-  [self openAll:[sender tag] withDisposition:NEW_WINDOW];
+  WindowOpenDisposition disposition = WindowOpenDisposition::NEW_WINDOW;
+  [self openAll:[sender tag] withDisposition:disposition];
 }
 
 - (IBAction)openAllBookmarksIncognitoWindow:(id)sender {
-  [self openAll:[sender tag] withDisposition:OFF_THE_RECORD];
+  WindowOpenDisposition disposition = WindowOpenDisposition::OFF_THE_RECORD;
+  [self openAll:[sender tag] withDisposition:disposition];
 }
 
 @end  // BookmarkMenuCocoaController