Convert WindowOpenDisposition to an enum class.

chrome/browser/browser_encoding_browsertest.cc

 // Copyright (c) 2012 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 <stddef.h>
 
 #include "base/bind.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
@@ skipping 307 matching lines @@
 
     // Get the encoding used for the page, it must be the default charset we
     // just set.
     EXPECT_EQ("ISO-8859-4", web_contents->GetEncoding());
 
     // Enable the encoding auto detection.
     browser()->profile()->GetPrefs()->SetBoolean(
         prefs::kWebKitUsesUniversalDetector, true);
 
     content::TestNavigationObserver observer(web_contents);
-    chrome::Reload(browser(), CURRENT_TAB);
+    chrome::Reload(browser(), WindowOpenDisposition::CURRENT_TAB);
     observer.Wait();
 
     // Re-get the encoding of page. It should return the real encoding now.
     EXPECT_EQ(kTestDatas[i].expected_encoding, web_contents->GetEncoding());
 
     // Dump the page, the content of dump page should be equal with our expect
     // result file.
     base::FilePath expected_result_file_name =
         base::FilePath().AppendASCII(kAutoDetectDir).
         AppendASCII(kExpectedResultDir).
         AppendASCII(kTestDatas[i].expected_result);
     SaveAndCompare(kTestDatas[i].test_file_name, expected_result_file_name);
   }
 }