Attempting to re-land a small portion of this change... Simply add links from

net/socket/socks_client_socket_pool.h

Index: net/socket/socks_client_socket_pool.h
diff --git a/net/socket/socks_client_socket_pool.h b/net/socket/socks_client_socket_pool.h
index 3fc7df6831935279b665efafac4bfd0eba5a2ce0..8583d96fecab71567abe36a376177c1e9e549631 100644
--- a/net/socket/socks_client_socket_pool.h
+++ b/net/socket/socks_client_socket_pool.h
@@ -105,7 +105,8 @@ class SOCKSConnectJob : public ConnectJob {
   DISALLOW_COPY_AND_ASSIGN(SOCKSConnectJob);
 };
 
-class NET_EXPORT_PRIVATE SOCKSClientSocketPool : public ClientSocketPool {
+class NET_EXPORT_PRIVATE SOCKSClientSocketPool
+    : public ClientSocketPool, public LayeredPool {
  public:
   SOCKSClientSocketPool(
       int max_sockets,
@@ -139,6 +140,8 @@ class NET_EXPORT_PRIVATE SOCKSClientSocketPool : public ClientSocketPool {
 
   virtual void Flush() OVERRIDE;
 
+  virtual bool IsStalled() const OVERRIDE;
+
   virtual void CloseIdleSockets() OVERRIDE;
 
   virtual int IdleSocketCount() const OVERRIDE;
@@ -150,6 +153,10 @@ class NET_EXPORT_PRIVATE SOCKSClientSocketPool : public ClientSocketPool {
       const std::string& group_name,
       const ClientSocketHandle* handle) const OVERRIDE;
 
+  virtual void AddLayeredPool(LayeredPool* layered_pool) OVERRIDE;
+
+  virtual void RemoveLayeredPool(LayeredPool* layered_pool) OVERRIDE;
+
   virtual base::DictionaryValue* GetInfoAsValue(
       const std::string& name,
       const std::string& type,
@@ -159,6 +166,9 @@ class NET_EXPORT_PRIVATE SOCKSClientSocketPool : public ClientSocketPool {
 
   virtual ClientSocketPoolHistograms* histograms() const OVERRIDE;
 
+  // LayeredPool implementation.
+  virtual bool CloseOneIdleConnection() OVERRIDE;
+
  private:
   typedef ClientSocketPoolBase<SOCKSSocketParams> PoolBase;