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

net/http/http_proxy_client_socket_pool.cc

Index: net/http/http_proxy_client_socket_pool.cc
diff --git a/net/http/http_proxy_client_socket_pool.cc b/net/http/http_proxy_client_socket_pool.cc
index 6b53e62f68e2c358343460e12fe21db0ebdf6827..67018779f3405c5c9b61109b6a21776a8f712fa7 100644
--- a/net/http/http_proxy_client_socket_pool.cc
+++ b/net/http/http_proxy_client_socket_pool.cc
@@ -397,9 +397,21 @@ HttpProxyClientSocketPool::HttpProxyClientSocketPool(
             new HttpProxyConnectJobFactory(transport_pool,
                                            ssl_pool,
                                            host_resolver,
-                                           net_log)) {}
+                                           net_log)) {
+  // We should always have a |transport_pool_| except in unit tests.
+  if (transport_pool_)
+    transport_pool_->AddLayeredPool(this);
+  if (ssl_pool_)
+    ssl_pool_->AddLayeredPool(this);
+}
 
-HttpProxyClientSocketPool::~HttpProxyClientSocketPool() {}
+HttpProxyClientSocketPool::~HttpProxyClientSocketPool() {
+  if (ssl_pool_)
+    ssl_pool_->RemoveLayeredPool(this);
+  // We should always have a |transport_pool_| except in unit tests.
+  if (transport_pool_)
+    transport_pool_->RemoveLayeredPool(this);
+}
 
 int HttpProxyClientSocketPool::RequestSocket(
     const std::string& group_name, const void* socket_params,
@@ -438,6 +450,12 @@ void HttpProxyClientSocketPool::Flush() {
   base_.Flush();
 }
 
+bool HttpProxyClientSocketPool::IsStalled() const {
+  return base_.IsStalled() ||
+      (transport_pool_ && transport_pool_->IsStalled()) ||
+      (ssl_pool_ && ssl_pool_->IsStalled());
+}
+
 void HttpProxyClientSocketPool::CloseIdleSockets() {
   base_.CloseIdleSockets();
 }
@@ -456,6 +474,14 @@ LoadState HttpProxyClientSocketPool::GetLoadState(
   return base_.GetLoadState(group_name, handle);
 }
 
+void HttpProxyClientSocketPool::AddLayeredPool(LayeredPool* layered_pool) {
+  base_.AddLayeredPool(layered_pool);
+}
+
+void HttpProxyClientSocketPool::RemoveLayeredPool(LayeredPool* layered_pool) {
+  base_.RemoveLayeredPool(layered_pool);
+}
+
 DictionaryValue* HttpProxyClientSocketPool::GetInfoAsValue(
     const std::string& name,
     const std::string& type,
@@ -486,4 +512,10 @@ ClientSocketPoolHistograms* HttpProxyClientSocketPool::histograms() const {
   return base_.histograms();
 }
 
+bool HttpProxyClientSocketPool::CloseOneIdleConnection() {
+  if (base_.CloseOneIdleSocket())
+    return true;
+  return base_.CloseOneIdleConnectionInLayeredPool();
+}
+
 }  // namespace net