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

net/socket/client_socket_handle.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/socket/client_socket_handle.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/metrics/histogram.h"
 #include "base/logging.h"
 #include "net/base/net_errors.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/client_socket_pool_histograms.h"
 
 namespace net {
 
 ClientSocketHandle::ClientSocketHandle()
     : is_initialized_(false),
+      pool_(NULL),
+      layered_pool_(NULL),
       is_reused_(false),
       ALLOW_THIS_IN_INITIALIZER_LIST(callback_(
           base::Bind(&ClientSocketHandle::OnIOComplete,
                      base::Unretained(this)))),
       is_ssl_error_(false) {}
 
 ClientSocketHandle::~ClientSocketHandle() {
   Reset();
 }
 
@@ skipping 15 matching lines @@
       pool_->ReleaseSocket(group_name_, release_socket(), pool_id_);
   } else if (cancel) {
     // If we did not get initialized yet, we've got a socket request pending.
     // Cancel it.
     pool_->CancelRequest(group_name_, this);
   }
   is_initialized_ = false;
   group_name_.clear();
   is_reused_ = false;
   user_callback_.Reset();
+  if (layered_pool_) {
+    pool_->RemoveLayeredPool(layered_pool_);
+    layered_pool_ = NULL;
+  }
   pool_ = NULL;
   idle_time_ = base::TimeDelta();
   init_time_ = base::TimeTicks();
   setup_time_ = base::TimeDelta();
   pool_id_ = -1;
 }
 
 void ClientSocketHandle::ResetErrorState() {
   is_ssl_error_ = false;
   ssl_error_response_info_ = HttpResponseInfo();
   pending_http_proxy_connection_.reset();
 }
 
 LoadState ClientSocketHandle::GetLoadState() const {
   CHECK(!is_initialized());
   CHECK(!group_name_.empty());
   // Because of http://crbug.com/37810  we may not have a pool, but have
   // just a raw socket.
   if (!pool_)
     return LOAD_STATE_IDLE;
   return pool_->GetLoadState(group_name_, this);
 }
 
+bool ClientSocketHandle::IsPoolStalled() const {
+  return pool_->IsStalled();
+}
+
+void ClientSocketHandle::AddLayeredPool(LayeredPool* layered_pool) {
+  CHECK(layered_pool);
+  CHECK(!layered_pool_);
+  if (pool_) {
+    pool_->AddLayeredPool(layered_pool);
+    layered_pool_ = layered_pool;
+  }
+}
+
+void ClientSocketHandle::RemoveLayeredPool(LayeredPool* layered_pool) {
+  CHECK(layered_pool);
+  CHECK(layered_pool_);
+  if (pool_) {
+    pool_->RemoveLayeredPool(layered_pool);
+    layered_pool_ = NULL;
+  }
+}
+
 void ClientSocketHandle::OnIOComplete(int result) {
   CompletionCallback callback = user_callback_;
   user_callback_.Reset();
   HandleInitCompletion(result);
   callback.Run(result);
 }
 
 void ClientSocketHandle::HandleInitCompletion(int result) {
   CHECK_NE(ERR_IO_PENDING, result);
   if (result != OK) {
@@ skipping 29 matching lines @@
   // release() socket. It ends up working though, since those methods are being
   // used to layer sockets (and the destination sources are the same).
   DCHECK(socket_.get());
   socket_->NetLog().BeginEvent(
       NetLog::TYPE_SOCKET_IN_USE,
       make_scoped_refptr(new NetLogSourceParameter(
           "source_dependency", requesting_source_)));
 }
 
 }  // namespace net