Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/views/tabs/browser_tab_strip_controller.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 "chrome/browser/ui/views/tabs/browser_tab_strip_controller.h"
 
 #include "base/auto_reset.h"
 #include "base/macros.h"
 #include "base/task_runner_util.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 334 matching lines @@
 }
 
 void BrowserTabStripController::PerformDrop(bool drop_before,
                                             int index,
                                             const GURL& url) {
   chrome::NavigateParams params(browser_, url, ui::PAGE_TRANSITION_LINK);
   params.tabstrip_index = index;
 
   if (drop_before) {
     content::RecordAction(UserMetricsAction("Tab_DropURLBetweenTabs"));
-    params.disposition = NEW_FOREGROUND_TAB;
+    params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   } else {
     content::RecordAction(UserMetricsAction("Tab_DropURLOnTab"));
-    params.disposition = CURRENT_TAB;
+    params.disposition = WindowOpenDisposition::CURRENT_TAB;
     params.source_contents = model_->GetWebContentsAt(index);
   }
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
 }
 
 bool BrowserTabStripController::IsCompatibleWith(TabStrip* other) const {
   Profile* other_profile =
       static_cast<BrowserTabStripController*>(other->controller())->profile();
   return other_profile == profile();
@@ skipping 212 matching lines @@
   content::WebPluginInfo plugin;
   tabstrip_->FileSupported(
       url,
       mime_type.empty() || mime_util::IsSupportedMimeType(mime_type) ||
           content::PluginService::GetInstance()->GetPluginInfo(
               -1,                // process ID
               MSG_ROUTING_NONE,  // routing ID
               model_->profile()->GetResourceContext(), url, GURL(), mime_type,
               false, NULL, &plugin, NULL));
 }