base::Bind: Convert proxy_resolving_client_socket.[cc,h] and deps.

net/proxy/proxy_service.h

Index: net/proxy/proxy_service.h
diff --git a/net/proxy/proxy_service.h b/net/proxy/proxy_service.h
index 4db51b85879e27c1f4586b5faa11e47114959439..0e011c5963de894e354c133d9bd79f7e5b59433f 100644
--- a/net/proxy/proxy_service.h
+++ b/net/proxy/proxy_service.h
@@ -99,7 +99,7 @@ class NET_EXPORT ProxyService : public NetworkChangeNotifier::IPAddressObserver,
   // Profiling information for the request is saved to |net_log| if non-NULL.
   int ReconsiderProxyAfterError(const GURL& url,
                                 ProxyInfo* results,
-                                OldCompletionCallback* callback,
+                                const CompletionCallback& callback,
                                 PacRequest** pac_request,
                                 const BoundNetLog& net_log);
 
@@ -404,7 +404,7 @@ class NET_EXPORT SyncProxyServiceHelper
   ProxyService* proxy_service_;
 
   base::WaitableEvent event_;
-  OldCompletionCallbackImpl<SyncProxyServiceHelper> callback_;
+  CompletionCallback callback_;
   ProxyInfo proxy_info_;
   int result_;
 };