Remove a DCHECK on ClientSocketHandle state from proxy code.

net/http/http_proxy_client_socket.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.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_util.h"
@@ skipping 493 matching lines @@
       // 501 response bodies that contain a useful error message.  For
       // example, Squid uses a 404 response to report the DNS error: "The
       // domain name does not exist."
       LogBlockedTunnelResponse();
       return ERR_TUNNEL_CONNECTION_FAILED;
   }
 }
 
 int HttpProxyClientSocket::DoDrainBody() {
   DCHECK(drain_buf_.get());
-  DCHECK(transport_->is_initialized());
   next_state_ = STATE_DRAIN_BODY_COMPLETE;
   return http_stream_parser_->ReadResponseBody(
       drain_buf_.get(), kDrainBodyBufferSize, io_callback_);
 }
 
 int HttpProxyClientSocket::DoDrainBodyComplete(int result) {
   if (result < 0)
     return ERR_UNABLE_TO_REUSE_CONNECTION_FOR_PROXY_AUTH;
 
   if (!http_stream_parser_->IsResponseBodyComplete()) {
     // Keep draining.
     next_state_ = STATE_DRAIN_BODY;
     return OK;
   }
 
   return DidDrainBodyForAuthRestart();
 }
 
 //----------------------------------------------------------------
 
 }  // namespace net