Delete the ClientSocketPoolHistograms class.

net/socket/socks_client_socket_pool.h

 // 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.
 
 #ifndef NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
 #define NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 #include "net/base/host_port_pair.h"
 #include "net/dns/host_resolver.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/client_socket_pool_base.h"
-#include "net/socket/client_socket_pool_histograms.h"
 
 namespace net {
 
 class ConnectJobFactory;
 class TransportClientSocketPool;
 class TransportSocketParams;
 
 class NET_EXPORT_PRIVATE SOCKSSocketParams
     : public base::RefCounted<SOCKSSocketParams> {
  public:
@@ skipping 75 matching lines @@
 };
 
 class NET_EXPORT_PRIVATE SOCKSClientSocketPool
     : public ClientSocketPool, public HigherLayeredPool {
  public:
   typedef SOCKSSocketParams SocketParams;
 
   SOCKSClientSocketPool(
       int max_sockets,
       int max_sockets_per_group,
-      ClientSocketPoolHistograms* histograms,
       HostResolver* host_resolver,
       TransportClientSocketPool* transport_pool,
       NetLog* net_log);
 
   ~SOCKSClientSocketPool() override;
 
   // ClientSocketPool implementation.
   int RequestSocket(const std::string& group_name,
                     const void* connect_params,
                     RequestPriority priority,
@@ skipping 24 matching lines @@
   LoadState GetLoadState(const std::string& group_name,
                          const ClientSocketHandle* handle) const override;
 
   base::DictionaryValue* GetInfoAsValue(
       const std::string& name,
       const std::string& type,
       bool include_nested_pools) const override;
 
   base::TimeDelta ConnectionTimeout() const override;
 
-  ClientSocketPoolHistograms* histograms() const override;
-
   // LowerLayeredPool implementation.
   bool IsStalled() const override;
 
   void AddHigherLayeredPool(HigherLayeredPool* higher_pool) override;
 
   void RemoveHigherLayeredPool(HigherLayeredPool* higher_pool) override;
 
   // HigherLayeredPool implementation.
   bool CloseOneIdleConnection() override;
 
@@ skipping 29 matching lines @@
 
   TransportClientSocketPool* const transport_pool_;
   PoolBase base_;
 
   DISALLOW_COPY_AND_ASSIGN(SOCKSClientSocketPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_