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

net/socket_stream/socket_stream_job_manager.h

 // Copyright (c) 2010 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_SOCKET_STREAM_SOCKET_STREAM_JOB_MANAGER_H_
 #define NET_SOCKET_STREAM_SOCKET_STREAM_JOB_MANAGER_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "net/socket_stream/socket_stream.h"
 #include "net/socket_stream/socket_stream_job.h"
 
+template <typename T> struct DefaultSingletonTraits;
 class GURL;
 
 namespace net {
 
 class SocketStreamJobManager {
  public:
-  SocketStreamJobManager();
-  ~SocketStreamJobManager();
+  // Returns the singleton instance.
+  static SocketStreamJobManager* GetInstance();
 
   SocketStreamJob* CreateJob(
       const GURL& url, SocketStream::Delegate* delegate) const;
 
   SocketStreamJob::ProtocolFactory* RegisterProtocolFactory(
       const std::string& scheme, SocketStreamJob::ProtocolFactory* factory);
 
  private:
+  friend struct DefaultSingletonTraits<SocketStreamJobManager>;
   typedef std::map<std::string, SocketStreamJob::ProtocolFactory*> FactoryMap;
 
+  SocketStreamJobManager();
+  ~SocketStreamJobManager();
+
   mutable Lock lock_;
   FactoryMap factories_;
 
   DISALLOW_COPY_AND_ASSIGN(SocketStreamJobManager);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_STREAM_SOCKET_STREAM_JOB_MANAGER_H_