Convert WindowOpenDisposition to an enum class.

chrome/browser/ui/cocoa/browser_window_cocoa.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.
 
 #include "chrome/browser/ui/cocoa/browser_window_cocoa.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #import "base/mac/sdk_forward_declarations.h"
@@ skipping 734 matching lines @@
   else if (command_id == IDC_COPY)
     [NSApp sendAction:@selector(copy:) to:nil from:nil];
   else
     [NSApp sendAction:@selector(paste:) to:nil from:nil];
 }
 
 WindowOpenDisposition BrowserWindowCocoa::GetDispositionForPopupBounds(
     const gfx::Rect& bounds) {
   // When using Cocoa's System Fullscreen mode, convert popups into tabs.
   if ([controller_ isInAppKitFullscreen])
-    return NEW_FOREGROUND_TAB;
-  return NEW_POPUP;
+    return WindowOpenDisposition::NEW_FOREGROUND_TAB;
+  return WindowOpenDisposition::NEW_POPUP;
 }
 
 FindBar* BrowserWindowCocoa::CreateFindBar() {
   // We could push the AddFindBar() call into the FindBarBridge
   // constructor or the FindBarCocoaController init, but that makes
   // unit testing difficult, since we would also require a
   // BrowserWindow object.
   FindBarBridge* bridge = new FindBarBridge(browser_);
   AddFindBar(bridge->find_bar_cocoa_controller());
   return bridge;
@@ skipping 70 matching lines @@
 ExclusiveAccessContext* BrowserWindowCocoa::GetExclusiveAccessContext() {
   return [controller_ exclusiveAccessController];
 }
 
 void BrowserWindowCocoa::ShowImeWarningBubble(
     const extensions::Extension* extension,
     const base::Callback<void(ImeWarningBubblePermissionStatus status)>&
         callback) {
   NOTREACHED() << "The IME warning bubble is unsupported on this platform.";
 }