Delete the ClientSocketPoolHistograms class.

net/socket/websocket_transport_client_socket_pool.cc

Index: net/socket/websocket_transport_client_socket_pool.cc
diff --git a/net/socket/websocket_transport_client_socket_pool.cc b/net/socket/websocket_transport_client_socket_pool.cc
index ec83529d7baa081654f13e7d5080ceacc7d2d82d..1dce34d37cb5c2953484fcc1ba401713c450b62f 100644
--- a/net/socket/websocket_transport_client_socket_pool.cc
+++ b/net/socket/websocket_transport_client_socket_pool.cc
@@ -229,18 +229,15 @@ int WebSocketTransportConnectJob::ConnectInternal() {
 WebSocketTransportClientSocketPool::WebSocketTransportClientSocketPool(
     int max_sockets,
     int max_sockets_per_group,
-    ClientSocketPoolHistograms* histograms,
     HostResolver* host_resolver,
     ClientSocketFactory* client_socket_factory,
     NetLog* net_log)
     : TransportClientSocketPool(max_sockets,
                                 max_sockets_per_group,
-                                histograms,
                                 host_resolver,
                                 client_socket_factory,
                                 net_log),
       connect_job_delegate_(this),
-      histograms_(histograms),
       pool_net_log_(net_log),
       client_socket_factory_(client_socket_factory),
       host_resolver_(host_resolver),
@@ -456,11 +453,6 @@ TimeDelta WebSocketTransportClientSocketPool::ConnectionTimeout() const {
   return TimeDelta::FromSeconds(kTransportConnectJobTimeoutInSeconds);
 }
 
-ClientSocketPoolHistograms* WebSocketTransportClientSocketPool::histograms()
-    const {
-  return histograms_;
-}
-
 bool WebSocketTransportClientSocketPool::IsStalled() const {
   return !stalled_request_queue_.empty();
 }