Convert WindowOpenDisposition to an enum class.

chrome/browser/devtools/chrome_devtools_manager_delegate.cc

 // Copyright 2014 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 "chrome/browser/devtools/chrome_devtools_manager_delegate.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/devtools/devtools_network_protocol_handler.h"
 #include "chrome/browser/devtools/devtools_window.h"
@@ skipping 107 matching lines @@
           host->GetLastCommittedURL().host());
   if (extension)
     return extension->name();
   return "";
 }
 
 scoped_refptr<content::DevToolsAgentHost>
 ChromeDevToolsManagerDelegate::CreateNewTarget(const GURL& url) {
   chrome::NavigateParams params(ProfileManager::GetLastUsedProfile(),
       url, ui::PAGE_TRANSITION_AUTO_TOPLEVEL);
-  params.disposition = NEW_FOREGROUND_TAB;
+  params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   chrome::Navigate(&params);
   if (!params.target_contents)
     return nullptr;
   return content::DevToolsAgentHost::GetOrCreateFor(params.target_contents);
 }
 
 void ChromeDevToolsManagerDelegate::DevToolsAgentStateChanged(
     content::DevToolsAgentHost* agent_host,
     bool attached) {
   network_protocol_handler_->DevToolsAgentStateChanged(agent_host, attached);
 }