Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/webui/webui_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/command_line.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/ui/webui/chrome_web_ui_controller_factory.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 60 matching lines @@
       ->tab_strip_model()
       ->GetActiveWebContents()
       ->GetWebUI()
       ->AddMessageHandler(test_handler);
   test_handler->AllowJavascriptForTesting();
 
   // Push onto window.history. Back should now be an in-page navigation.
   ASSERT_TRUE(content::ExecuteScript(
       browser()->tab_strip_model()->GetActiveWebContents(),
       "window.history.pushState({}, '', 'foo.html')"));
-  chrome::GoBack(browser(), CURRENT_TAB);
+  chrome::GoBack(browser(), WindowOpenDisposition::CURRENT_TAB);
   content::WaitForLoadStop(
       browser()->tab_strip_model()->GetActiveWebContents());
 
   // Test handler should still have JavaScript allowed after in-page navigation.
   EXPECT_TRUE(test_handler->IsJavascriptAllowed());
 
-  chrome::Reload(browser(), CURRENT_TAB);
+  chrome::Reload(browser(), WindowOpenDisposition::CURRENT_TAB);
   content::WaitForLoadStop(
       browser()->tab_strip_model()->GetActiveWebContents());
 
   // Verify that after a reload, the test handler has been disallowed.
   EXPECT_FALSE(test_handler->IsJavascriptAllowed());
 }