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

net/socket/client_socket_handle.h

Index: net/socket/client_socket_handle.h
diff --git a/net/socket/client_socket_handle.h b/net/socket/client_socket_handle.h
index 23fc5cf07199029d81816724c746ffbf22a5e574..003730c07bbdd6ec6abe1257db51563a7b51e540 100644
--- a/net/socket/client_socket_handle.h
+++ b/net/socket/client_socket_handle.h
@@ -74,7 +74,7 @@ class NET_EXPORT ClientSocketHandle {
   int Init(const std::string& group_name,
            const scoped_refptr<SocketParams>& socket_params,
            RequestPriority priority,
-           OldCompletionCallback* callback,
+           const CompletionCallback& callback,
            PoolType* pool,
            const BoundNetLog& net_log);
 
@@ -173,7 +173,7 @@ class NET_EXPORT ClientSocketHandle {
   std::string group_name_;
   bool is_reused_;
   OldCompletionCallbackImpl<ClientSocketHandle> callback_;
-  OldCompletionCallback* user_callback_;
+  CompletionCallback user_callback_;
   base::TimeDelta idle_time_;
   int pool_id_;  // See ClientSocketPool::ReleaseSocket() for an explanation.
   bool is_ssl_error_;
@@ -192,7 +192,7 @@ template <typename SocketParams, typename PoolType>
 int ClientSocketHandle::Init(const std::string& group_name,
                              const scoped_refptr<SocketParams>& socket_params,
                              RequestPriority priority,
-                             OldCompletionCallback* callback,
+                             const CompletionCallback& callback,
                              PoolType* pool,
                              const BoundNetLog& net_log) {
   requesting_source_ = net_log.source();