Remove HTTP pipelining support.

net/http/http_pipelined_host_test_util.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_pipelined_host_test_util.h"
-
-#include "net/proxy/proxy_info.h"
-#include "net/ssl/ssl_config_service.h"
-
-namespace net {
-
-MockHostDelegate::MockHostDelegate() {
-}
-
-MockHostDelegate::~MockHostDelegate() {
-}
-
-MockPipelineFactory::MockPipelineFactory() {
-}
-
-MockPipelineFactory::~MockPipelineFactory() {
-}
-
-MockPipeline::MockPipeline(int depth, bool usable, bool active)
-    : depth_(depth),
-      usable_(usable),
-      active_(active) {
-}
-
-MockPipeline::~MockPipeline() {
-}
-
-}  // namespace net