Revert r113405, since it appears to be causing a crash and a hang.

net/socket/client_socket_pool.h

Index: net/socket/client_socket_pool.h
diff --git a/net/socket/client_socket_pool.h b/net/socket/client_socket_pool.h
index 8c0c97f4205e843a1f9e08bdd9ed594962736408..92f0c413ac38628b20ce2ae934359840ba7aa6fe 100644
--- a/net/socket/client_socket_pool.h
+++ b/net/socket/client_socket_pool.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -29,17 +29,6 @@ class ClientSocketHandle;
 class ClientSocketPoolHistograms;
 class StreamSocket;
 
-// ClientSocketPools are layered. This defines an interface for lower level
-// socket pools to communicate with higher layer pools.
-class NET_EXPORT LayeredPool {
- public:
-  virtual ~LayeredPool() {}
-
-  // Instructs the LayeredPool to close an idle connection. Return true if one
-  // was closed.
-  virtual bool CloseOneIdleConnection() = 0;
-};
-
 // A ClientSocketPool is used to restrict the number of sockets open at a time.
 // It also maintains a list of idle persistent sockets.
 //
@@ -121,10 +110,6 @@ class NET_EXPORT ClientSocketPool {
   // the pool.  Does not flush any pools wrapped by |this|.
   virtual void Flush() = 0;
 
-  // Returns true if a new request may hit a per-pool (not per-host) max socket
-  // limit.
-  virtual bool IsStalled() const = 0;
-
   // Called to close any idle connections held by the connection manager.
   virtual void CloseIdleSockets() = 0;
 
@@ -138,12 +123,6 @@ class NET_EXPORT ClientSocketPool {
   virtual LoadState GetLoadState(const std::string& group_name,
                                  const ClientSocketHandle* handle) const = 0;
 
-  // Adds a LayeredPool on top of |this|.
-  virtual void AddLayeredPool(LayeredPool* layered_pool) = 0;
-
-  // Removes a LayeredPool from |this|.
-  virtual void RemoveLayeredPool(LayeredPool* layered_pool) = 0;
-
   // Retrieves information on the current state of the pool as a
   // DictionaryValue.  Caller takes possession of the returned value.
   // If |include_nested_pools| is true, the states of any nested