Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/webui/media_router/media_router_dialog_controller_impl_browsertest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/macros.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/media_router/media_router_dialog_controller_impl.h"
 #include "chrome/browser/ui/webui/media_router/media_router_ui.h"
@@ skipping 92 matching lines @@
   media_router_dialog_ = dialog_controller_->GetMediaRouterDialog();
   ASSERT_TRUE(media_router_dialog_);
 
   {
     // Wait for the dialog to initialize.
     TestNavigationObserver nav_observer(media_router_dialog_);
     nav_observer.Wait();
 
     // Refresh and block until dialog WebContents has been destroyed.
     content::WebContentsDestroyedWatcher dialog_watcher(media_router_dialog_);
-    chrome::Reload(browser(), CURRENT_TAB);
+    chrome::Reload(browser(), WindowOpenDisposition::CURRENT_TAB);
     dialog_watcher.Wait();
   }
 
   // Verify that dialog has been removed again.
   EXPECT_FALSE(dialog_controller_->GetMediaRouterDialog());
 }
 
 IN_PROC_BROWSER_TEST_F(MediaRouterDialogControllerBrowserTest,
     RenderProcessHost) {
   // New media router dialog is a constrained window, so the number of
@@ skipping 10 matching lines @@
 
   // Blocks until the dialog WebContents has been destroyed.
   rph_watcher.Wait();
   dialog_watcher.Wait();
 
   // Entry has been removed.
   EXPECT_FALSE(dialog_controller_->GetMediaRouterDialog());
 }
 
 }  // namespace media_router