Reverting again ... More crashes, and the instrumentation did not appear to help

net/socket/client_socket_handle.h

Index: net/socket/client_socket_handle.h
===================================================================
--- net/socket/client_socket_handle.h	(revision 131144)
+++ net/socket/client_socket_handle.h	(working copy)
@@ -92,12 +92,6 @@
   // initialized the ClientSocketHandle.
   LoadState GetLoadState() const;
 
-  bool IsPoolStalled() const;
-
-  void AddLayeredPool(LayeredPool* layered_pool);
-
-  void RemoveLayeredPool(LayeredPool* layered_pool);
-
   // Returns true when Init() has completed successfully.
   bool is_initialized() const { return is_initialized_; }
 
@@ -170,7 +164,6 @@
 
   bool is_initialized_;
   ClientSocketPool* pool_;
-  LayeredPool* layered_pool_;
   scoped_ptr<StreamSocket> socket_;
   std::string group_name_;
   bool is_reused_;