Delete the ClientSocketPoolHistograms class.

net/http/http_proxy_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_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/net_export.h"
 #include "net/http/http_auth.h"
 #include "net/http/http_response_info.h"
 #include "net/http/proxy_client_socket.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/client_socket_pool_base.h"
-#include "net/socket/client_socket_pool_histograms.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/spdy/spdy_session.h"
 
 namespace net {
 
 class HttpAuthCache;
 class HttpAuthHandlerFactory;
 class ProxyDelegate;
 class SSLClientSocketPool;
 class SSLSocketParams;
@@ skipping 148 matching lines @@
 };
 
 class NET_EXPORT_PRIVATE HttpProxyClientSocketPool
     : public ClientSocketPool,
       public HigherLayeredPool {
  public:
   typedef HttpProxySocketParams SocketParams;
 
   HttpProxyClientSocketPool(int max_sockets,
                             int max_sockets_per_group,
-                            ClientSocketPoolHistograms* histograms,
                             TransportClientSocketPool* transport_pool,
                             SSLClientSocketPool* ssl_pool,
                             NetLog* net_log);
 
   ~HttpProxyClientSocketPool() 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 26 matching lines @@
   TransportClientSocketPool* const transport_pool_;
   SSLClientSocketPool* const ssl_pool_;
   PoolBase base_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocketPool);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_