Close idle H2 sockets when SpdySession is initialized.

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 8d8fd4bc2846706b80b1dd9e760d151ebcdcd369..73bf536272739c7ddb614d1c6dedb144d7047500 100644
--- a/net/socket/websocket_transport_client_socket_pool.cc
+++ b/net/socket/websocket_transport_client_socket_pool.cc
@@ -463,6 +463,11 @@ void WebSocketTransportClientSocketPool::CloseIdleSockets() {
   // We have no idle sockets.
 }
 
+void WebSocketTransportClientSocketPool::CloseIdleSocketsInGroup(
+    const std::string& group_name) {
+  // We have no idle sockets.
+}
+
 int WebSocketTransportClientSocketPool::IdleSocketCount() const {
   return 0;
 }