Added kWebKitErrorUnsafePort ios/web constant.

ios/web/public/web_kit_constants.h

 // Copyright 2015 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.
 
 #ifndef IOS_WEB_PUBLIC_WEB_KIT_CONSTANTS_H_
 #define IOS_WEB_PUBLIC_WEB_KIT_CONSTANTS_H_
 
 // This header defines missing symbols from WebKit.
 // See WebKitErrors.h on Mac SDK.
 
 namespace web {
 
 // Indicates WebKit errors.
 extern const char kWebKitErrorDomain[];
 
 // MIME type is not supported.
 const long kWebKitErrorCannotShowMimeType = 100;
 
 // Can not change location URL.
 const long kWebKitErrorCannotShowUrl = 101;
 
 // Frame load was interrupted by a policy change.
 const long kWebKitErrorFrameLoadInterruptedByPolicyChange = 102;
 
 // Undocumented iOS-specific WebKit error.
+const long kWebKitErrorUnsafePort = 103;
 const long kWebKitErrorPlugInLoadFailed = 204;
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEB_KIT_CONSTANTS_H_