[Cronet] Enable chunked upload in CronetUrlRequest

net/url_request/url_request.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/url_request/url_request.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 195 matching lines @@
 
 void URLRequest::AppendChunkToUpload(const char* bytes,
                                      int bytes_len,
                                      bool is_last_chunk) {
   DCHECK(upload_data_stream_);
   DCHECK(upload_data_stream_->is_chunked());
   upload_chunked_data_stream_->AppendData(bytes, bytes_len, is_last_chunk);
 }
 
 void URLRequest::set_upload(scoped_ptr<UploadDataStream> upload) {
-  DCHECK(!upload->is_chunked());
   upload_data_stream_ = upload.Pass();
 }
 
 const UploadDataStream* URLRequest::get_upload() const {
   return upload_data_stream_.get();
 }
 
 bool URLRequest::has_upload() const {
   return upload_data_stream_.get() != NULL;
 }
@@ skipping 964 matching lines @@
       new base::debug::StackTrace(NULL, 0);
   *stack_trace_copy = stack_trace;
   stack_trace_.reset(stack_trace_copy);
 }
 
 const base::debug::StackTrace* URLRequest::stack_trace() const {
   return stack_trace_.get();
 }
 
 }  // namespace net