Add a new GetInstance() method for singleton classes under chrome/service and /net.

net/websockets/websocket_throttle.h

 // Copyright (c) 2009 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 NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_
 #define NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_
 #pragma once
 
 #include <deque>
 #include <string>
 
 #include "base/hash_tables.h"
-#include "base/singleton.h"
+
+template <typename T> struct DefaultSingletonTraits;
 
 namespace net {
 
 class SocketStream;
 class WebSocketJob;
 
 // SocketStreamThrottle for WebSocket protocol.
 // Implements the client-side requirements in the spec.
 // http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol
 // 4.1 Handshake
 //   1.   If the user agent already has a Web Socket connection to the
 //        remote host (IP address) identified by /host/, even if known by
 //        another name, wait until that connection has been established or
 //        for that connection to have failed.
 class WebSocketThrottle {
  public:
+  // Returns the singleton instance.
+  static WebSocketThrottle* GetInstance();
+
   // Puts |job| in |queue_| and queues for the destination addresses
   // of |job|.
   // If other job is using the same destination address, set |job| waiting.
   void PutInQueue(WebSocketJob* job);
 
   // Removes |job| from |queue_| and queues for the destination addresses
   // of |job|.
   void RemoveFromQueue(WebSocketJob* job);
 
   // Checks sockets waiting in |queue_| and check the socket is the front of
@@ skipping 13 matching lines @@
   // Key: string of host's address.  Value: queue of sockets for the address.
   ConnectingAddressMap addr_map_;
 
   // Queue of sockets for websockets in opening state.
   ConnectingQueue queue_;
 };
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_THROTTLE_H_