Delete the ClientSocketPoolHistograms class.

net/http/http_proxy_client_socket_pool.cc

 // 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.
 
 #include "net/http/http_proxy_client_socket_pool.h"
 
 #include <algorithm>
 
 #include "base/compiler_specific.h"
 #include "base/time/time.h"
@@ skipping 422 matching lines @@
 
 base::TimeDelta
 HttpProxyClientSocketPool::HttpProxyConnectJobFactory::ConnectionTimeout(
     ) const {
   return timeout_;
 }
 
 HttpProxyClientSocketPool::HttpProxyClientSocketPool(
     int max_sockets,
     int max_sockets_per_group,
-    ClientSocketPoolHistograms* histograms,
     TransportClientSocketPool* transport_pool,
     SSLClientSocketPool* ssl_pool,
     NetLog* net_log)
     : transport_pool_(transport_pool),
       ssl_pool_(ssl_pool),
-      base_(this, max_sockets, max_sockets_per_group, histograms,
+      base_(this,
+            max_sockets,
+            max_sockets_per_group,
             ClientSocketPool::unused_idle_socket_timeout(),
             ClientSocketPool::used_idle_socket_timeout(),
-            new HttpProxyConnectJobFactory(transport_pool,
-                                           ssl_pool,
-                                           net_log)) {
+            new HttpProxyConnectJobFactory(transport_pool, ssl_pool, net_log)) {
   // We should always have a |transport_pool_| except in unit tests.
   if (transport_pool_)
     base_.AddLowerLayeredPool(transport_pool_);
   if (ssl_pool_)
     base_.AddLowerLayeredPool(ssl_pool_);
 }
 
 HttpProxyClientSocketPool::~HttpProxyClientSocketPool() {
 }
 
@@ skipping 72 matching lines @@
     }
     dict->Set("nested_pools", list);
   }
   return dict;
 }
 
 base::TimeDelta HttpProxyClientSocketPool::ConnectionTimeout() const {
   return base_.ConnectionTimeout();
 }
 
-ClientSocketPoolHistograms* HttpProxyClientSocketPool::histograms() const {
-  return base_.histograms();
-}
-
 bool HttpProxyClientSocketPool::IsStalled() const {
   return base_.IsStalled();
 }
 
 void HttpProxyClientSocketPool::AddHigherLayeredPool(
     HigherLayeredPool* higher_pool) {
   base_.AddHigherLayeredPool(higher_pool);
 }
 
 void HttpProxyClientSocketPool::RemoveHigherLayeredPool(
     HigherLayeredPool* higher_pool) {
   base_.RemoveHigherLayeredPool(higher_pool);
 }
 
 bool HttpProxyClientSocketPool::CloseOneIdleConnection() {
   if (base_.CloseOneIdleSocket())
     return true;
   return base_.CloseOneIdleConnectionInHigherLayeredPool();
 }
 
 }  // namespace net