Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/cocoa/applescript/window_applescript.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/applescript/window_applescript.h"
 
 #include <memory>
 
 #include "base/logging.h"
 #import "base/mac/foundation_util.h"
@@ skipping 182 matching lines @@
 - (void)insertInTabs:(TabAppleScript*)aTab atIndex:(int)index {
   // This method gets called when a new tab is created so
   // the container and property are set here.
   [aTab setContainer:self
             property:AppleScript::kTabsProperty];
 
   // Set how long it takes a tab to be created.
   base::TimeTicks newTabStartTime = base::TimeTicks::Now();
   chrome::NavigateParams params(browser_, GURL(chrome::kChromeUINewTabURL),
                                 ui::PAGE_TRANSITION_TYPED);
-  params.disposition = NEW_FOREGROUND_TAB;
+  params.disposition = WindowOpenDisposition::NEW_FOREGROUND_TAB;
   params.tabstrip_index = index;
   chrome::Navigate(&params);
   CoreTabHelper* core_tab_helper =
       CoreTabHelper::FromWebContents(params.target_contents);
   core_tab_helper->set_new_tab_start_time(newTabStartTime);
 
   [aTab setWebContents:params.target_contents];
 }
 
 - (void)removeFromTabsAtIndex:(int)index {
@@ skipping 39 matching lines @@
 
 - (void)handlesCloseScriptCommand:(NSCloseCommand*)command {
   AppleScript::LogAppleScriptUMA(AppleScript::AppleScriptCommand::WINDOW_CLOSE);
 
   // window() can be NULL during startup.
   if (browser_->window())
     browser_->window()->Close();
 }
 
 @end