extensions: Remove chrome.webSocketProxyPrivate API

chrome/browser/chromeos/web_socket_proxy_helper.h

-// Copyright (c) 2011 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 CHROME_BROWSER_CHROMEOS_WEB_SOCKET_PROXY_HELPER_H_
-#define CHROME_BROWSER_CHROMEOS_WEB_SOCKET_PROXY_HELPER_H_
-
-#include <string>
-#include "base/basictypes.h"
-
-namespace chromeos {
-
-// Helper class for WebSocketProxy.
-class WebSocketProxyHelper {
- public:
-  // Parses "passport:addr:hostname:port:" string.  Returns true on success.
-  static bool FetchPassportAddrNamePort(
-      uint8* begin, uint8* end,
-      std::string* passport, std::string* addr,
-      std::string* hostname, int* port);
-
-  // Fetches a token from the string and erases it. Token separtor is
-  // either ':' or ']:' if the token is started with '[' and
-  // |match_brackets|. Fetching position (start or end) is determined by
-  // |forward|. Returns whether the token was successfully fetched.
-  static bool FetchToken(bool forward, bool match_brackets,
-                         std::string* input,
-                         std::string* token);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_WEB_SOCKET_PROXY_HELPER_H_