Add const accessors to URLRequest and UploadData.

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 220 matching lines @@
   DCHECK(upload_->is_chunked());
   DCHECK_GT(bytes_len, 0);
   upload_->AppendChunk(bytes, bytes_len, is_last_chunk);
 }
 
 void URLRequest::set_upload(UploadData* upload) {
   upload_ = upload;
 }
 
 // Get the upload data directly.
-UploadData* URLRequest::get_upload() {
+const UploadData* URLRequest::get_upload() const {
   return upload_.get();
 }
 
+UploadData* URLRequest::get_upload_mutable() {
+  return upload_.get();
+}
+
 bool URLRequest::has_upload() const {
   return upload_ != NULL;
 }
 
 void URLRequest::SetExtraRequestHeaderById(int id, const string& value,
                                            bool overwrite) {
   DCHECK(!is_pending_);
   NOTREACHED() << "implement me!";
 }
 
@@ skipping 656 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