Delete the ClientSocketPoolHistograms class.

net/socket/websocket_transport_client_socket_pool.h

 // Copyright 2014 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_WEBSOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_
 #define NET_SOCKET_WEBSOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_
 
 #include <list>
 #include <map>
 #include <set>
 #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 "base/timer/timer.h"
 #include "net/base/net_export.h"
 #include "net/base/net_log.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/client_socket_pool_base.h"
 #include "net/socket/transport_client_socket_pool.h"
 
 namespace net {
 
 class ClientSocketFactory;
-class ClientSocketPoolHistograms;
 class HostResolver;
 class NetLog;
 class WebSocketEndpointLockManager;
 class WebSocketTransportConnectSubJob;
 
 // WebSocketTransportConnectJob handles the host resolution necessary for socket
 // creation and the TCP connect. WebSocketTransportConnectJob also has fallback
 // logic for IPv6 connect() timeouts (which may happen due to networks / routers
 // with broken IPv6 support). Those timeouts take 20s, so rather than make the
 // user wait 20s for the timeout to fire, we use a fallback timer
@@ skipping 72 matching lines @@
   bool had_ipv6_;
 
   DISALLOW_COPY_AND_ASSIGN(WebSocketTransportConnectJob);
 };
 
 class NET_EXPORT_PRIVATE WebSocketTransportClientSocketPool
     : public TransportClientSocketPool {
  public:
   WebSocketTransportClientSocketPool(int max_sockets,
                                      int max_sockets_per_group,
-                                     ClientSocketPoolHistograms* histograms,
                                      HostResolver* host_resolver,
                                      ClientSocketFactory* client_socket_factory,
                                      NetLog* net_log);
 
   ~WebSocketTransportClientSocketPool() override;
 
   // Allow another connection to be started to the IPEndPoint that this |handle|
   // is connected to. Used when the WebSocket handshake completes successfully.
   // This only works if the socket is connected, however the caller does not
   // need to explicitly check for this. Instead, ensure that dead sockets are
@@ skipping 20 matching lines @@
   void CloseIdleSockets() override;
   int IdleSocketCount() const override;
   int IdleSocketCountInGroup(const std::string& group_name) const override;
   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;
 
   // HigherLayeredPool implementation.
   bool IsStalled() const override;
 
  private:
   class ConnectJobDelegate : public ConnectJob::Delegate {
    public:
     explicit ConnectJobDelegate(WebSocketTransportClientSocketPool* owner);
     ~ConnectJobDelegate() override;
 
@@ skipping 48 matching lines @@
   const WebSocketTransportConnectJob* LookupConnectJob(
       const ClientSocketHandle* handle) const;
   void ActivateStalledRequest();
   bool DeleteStalledRequest(ClientSocketHandle* handle);
 
   ConnectJobDelegate connect_job_delegate_;
   std::set<const ClientSocketHandle*> pending_callbacks_;
   PendingConnectsMap pending_connects_;
   StalledRequestQueue stalled_request_queue_;
   StalledRequestMap stalled_request_map_;
-  ClientSocketPoolHistograms* const histograms_;
   NetLog* const pool_net_log_;
   ClientSocketFactory* const client_socket_factory_;
   HostResolver* const host_resolver_;
   const int max_sockets_;
   int handed_out_socket_count_;
   bool flushing_;
 
   base::WeakPtrFactory<WebSocketTransportClientSocketPool> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebSocketTransportClientSocketPool);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_WEBSOCKET_TRANSPORT_CLIENT_SOCKET_POOL_H_