Prevent URLFetcher::AppendChunkedData from dereferencing NULL pointers.

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 <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/debug/stack_trace.h"
 #include "base/lazy_instance.h"
 #include "base/memory/singleton.h"
 #include "base/message_loop/message_loop.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/rand_util.h"
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/lock.h"
 #include "base/values.h"
 #include "net/base/auth.h"
-#include "net/base/chunked_upload_data_stream.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/load_flags.h"
 #include "net/base/load_timing_info.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/network_delegate.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_util.h"
 #include "net/log/net_log.h"
@@ skipping 149 matching lines @@
   CHECK_EQ(1, deleted);
 
   int net_error = OK;
   // Log error only on failure, not cancellation, as even successful requests
   // are "cancelled" on destruction.
   if (status_.status() == URLRequestStatus::FAILED)
     net_error = status_.error();
   net_log_.EndEventWithNetErrorCode(NetLog::TYPE_REQUEST_ALIVE, net_error);
 }
 
-void URLRequest::EnableChunkedUpload() {
-  DCHECK(!upload_data_stream_ || upload_data_stream_->is_chunked());
-  if (!upload_data_stream_) {
-    upload_chunked_data_stream_ = new ChunkedUploadDataStream(0);
-    upload_data_stream_.reset(upload_chunked_data_stream_);
-  }
-}
-
-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) {
   upload_data_stream_ = std::move(upload);
 }
 
 const UploadDataStream* URLRequest::get_upload() const {
   return upload_data_stream_.get();
 }
 
 bool URLRequest::has_upload() const {
   return upload_data_stream_.get() != NULL;
@@ skipping 996 matching lines @@
 }
 
 void URLRequest::GetConnectionAttempts(ConnectionAttempts* out) const {
   if (job_)
     job_->GetConnectionAttempts(out);
   else
     out->clear();
 }
 
 }  // namespace net