Generalize the net module's LoadLog facility from a passive container, to an event stream (NetLog).

net/socket/socks5_client_socket.h

Index: net/socket/socks5_client_socket.h
===================================================================
--- net/socket/socks5_client_socket.h	(revision 41560)
+++ net/socket/socks5_client_socket.h	(working copy)
@@ -15,12 +15,13 @@
 #include "net/base/completion_callback.h"
 #include "net/base/host_resolver.h"
 #include "net/base/net_errors.h"
+#include "net/base/net_log.h"
 #include "net/socket/client_socket.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 namespace net {
 
-class LoadLog;
+class BoundNetLog;
 
 // This ClientSocket is used to setup a SOCKSv5 handshake with a socks proxy.
 // Currently no SOCKSv5 authentication is supported.
@@ -44,7 +45,7 @@
   // ClientSocket methods:
 
   // Does the SOCKS handshake and completes the protocol.
-  virtual int Connect(CompletionCallback* callback, LoadLog* load_log);
+  virtual int Connect(CompletionCallback* callback, const BoundNetLog& net_log);
   virtual void Disconnect();
   virtual bool IsConnected() const;
   virtual bool IsConnectedAndIdle() const;
@@ -133,7 +134,7 @@
 
   HostResolver::RequestInfo host_request_info_;
 
-  scoped_refptr<LoadLog> load_log_;
+  BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(SOCKS5ClientSocket);
 };