Revert of Remove 'blink::WebSerializedOrigin' (1/3)

Source/platform/exported/WebSerializedOrigin.cpp

 // 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 "config.h"
 #include "public/platform/WebSerializedOrigin.h"
 
 #include "platform/weborigin/SecurityOrigin.h"
-#include "public/platform/WebSecurityOrigin.h"
 
 namespace blink {
 
 WebSerializedOrigin::WebSerializedOrigin(const SecurityOrigin& origin)
     : m_string(origin.toString())
 {
 }
 
-WebSerializedOrigin::WebSerializedOrigin(const WebSecurityOrigin& origin)
-    : m_string(origin.toString())
-{
-}
-
 } // namespace blink