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

net/socket/client_socket_pool_base.h

Index: net/socket/client_socket_pool_base.h
diff --git a/net/socket/client_socket_pool_base.h b/net/socket/client_socket_pool_base.h
index 0cca6f4aa721ca78a370f4ed72fcc944f5b937c7..4efb43d0e7f52fabec79247f5258ad2f76834d15 100644
--- a/net/socket/client_socket_pool_base.h
+++ b/net/socket/client_socket_pool_base.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.
 //
@@ -28,7 +28,6 @@
 #include <map>
 #include <set>
 #include <string>
-#include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
@@ -240,11 +239,6 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
 
   virtual ~ClientSocketPoolBaseHelper();
 
-  // Adds/Removes layered pools. It is expected in the destructor that no
-  // layered pools remain.
-  void AddLayeredPool(LayeredPool* pool);
-  void RemoveLayeredPool(LayeredPool* pool);
-
   // See ClientSocketPool::RequestSocket for documentation on this function.
   // ClientSocketPoolBaseHelper takes ownership of |request|, which must be
   // heap allocated.
@@ -267,9 +261,6 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
   // See ClientSocketPool::Flush for documentation on this function.
   void Flush();
 
-  // See ClientSocketPool::IsStalled for documentation on this function.
-  bool IsStalled() const;
-
   // See ClientSocketPool::CloseIdleSockets for documentation on this function.
   void CloseIdleSockets();
 
@@ -314,16 +305,6 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
   // sockets that timed out or can't be reused.  Made public for testing.
   void CleanupIdleSockets(bool force);
 
-  // Closes one idle socket.  Picks the first one encountered.
-  // TODO(willchan): Consider a better algorithm for doing this.  Perhaps we
-  // should keep an ordered list of idle sockets, and close them in order.
-  // Requires maintaining more state.  It's not clear if it's worth it since
-  // I'm not sure if we hit this situation often.
-  bool CloseOneIdleSocket();
-
-  // Checks layered pools to see if they can close an idle connection.
-  bool CloseOneIdleConnectionInLayeredPool();
-
   // See ClientSocketPool::GetInfoAsValue for documentation on this function.
   base::DictionaryValue* GetInfoAsValue(const std::string& name,
                                         const std::string& type) const;
@@ -477,7 +458,7 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
   // at least one pending request. Returns true if any groups are stalled, and
   // if so, fills |group| and |group_name| with data of the stalled group
   // having highest priority.
-  bool FindTopStalledGroup(Group** group, std::string* group_name) const;
+  bool FindTopStalledGroup(Group** group, std::string* group_name);
 
   // Called when timer_ fires.  This method scans the idle sockets removing
   // sockets that timed out or can't be reused.
@@ -529,6 +510,13 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
   static void LogBoundConnectJobToRequest(
       const NetLog::Source& connect_job_source, const Request* request);
 
+  // Closes one idle socket.  Picks the first one encountered.
+  // TODO(willchan): Consider a better algorithm for doing this.  Perhaps we
+  // should keep an ordered list of idle sockets, and close them in order.
+  // Requires maintaining more state.  It's not clear if it's worth it since
+  // I'm not sure if we hit this situation often.
+  void CloseOneIdleSocket();
+
   // Same as CloseOneIdleSocket() except it won't close an idle socket in
   // |group|.  If |group| is NULL, it is ignored.  Returns true if it closed a
   // socket.
@@ -593,8 +581,6 @@ class NET_EXPORT_PRIVATE ClientSocketPoolBaseHelper
   // make sure that they are discarded rather than reused.
   int pool_generation_number_;
 
-  std::set<LayeredPool*> higher_layer_pools_;
-
   base::WeakPtrFactory<ClientSocketPoolBaseHelper> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientSocketPoolBaseHelper);
@@ -661,13 +647,6 @@ class ClientSocketPoolBase {
   virtual ~ClientSocketPoolBase() {}
 
   // These member functions simply forward to ClientSocketPoolBaseHelper.
-  void AddLayeredPool(LayeredPool* pool) {
-    helper_.AddLayeredPool(pool);
-  }
-
-  void RemoveLayeredPool(LayeredPool* pool) {
-    helper_.RemoveLayeredPool(pool);
-  }
 
   // RequestSocket bundles up the parameters into a Request and then forwards to
   // ClientSocketPoolBaseHelper::RequestSocket().
@@ -712,10 +691,6 @@ class ClientSocketPoolBase {
     return helper_.ReleaseSocket(group_name, socket, id);
   }
 
-  void Flush() { helper_.Flush(); }
-
-  bool IsStalled() const { return helper_.IsStalled(); }
-
   void CloseIdleSockets() { return helper_.CloseIdleSockets(); }
 
   int idle_socket_count() const { return helper_.idle_socket_count(); }
@@ -764,11 +739,7 @@ class ClientSocketPoolBase {
 
   void EnableConnectBackupJobs() { helper_.EnableConnectBackupJobs(); }
 
-  bool CloseOneIdleSocket() { return helper_.CloseOneIdleSocket(); }
-
-  bool CloseOneIdleConnectionInLayeredPool() {
-    return helper_.CloseOneIdleConnectionInLayeredPool();
-  }
+  void Flush() { helper_.Flush(); }
 
  private:
   // This adaptor class exists to bridge the