Support sending a sliced file in chromium....

net/url_request/url_request.cc

 // Copyright (c) 2006-2009 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/compiler_specific.h"
 #include "base/message_loop.h"
 #include "base/singleton.h"
 #include "base/stats_counters.h"
@@ skipping 68 matching lines @@
   GetJobManager()->UnregisterRequestInterceptor(interceptor);
 }
 
 void URLRequest::AppendBytesToUpload(const char* bytes, int bytes_len) {
   DCHECK(bytes_len > 0 && bytes);
   if (!upload_)
     upload_ = new UploadData();
   upload_->AppendBytes(bytes, bytes_len);
 }
 
-void URLRequest::AppendFileRangeToUpload(const FilePath& file_path,
-                                         uint64 offset, uint64 length) {
+void URLRequest::AppendFileRangeToUpload(
+    const FilePath& file_path,
+    uint64 offset,
+    uint64 length,
+    const base::Time& expected_modification_time) {
   DCHECK(file_path.value().length() > 0 && length > 0);
   if (!upload_)
     upload_ = new UploadData();
-  upload_->AppendFileRange(file_path, offset, length);
+  upload_->AppendFileRange(file_path, offset, length,
+                           expected_modification_time);
 }
 
 void URLRequest::set_upload(net::UploadData* upload) {
   upload_ = upload;
 }
 
 // Get the upload data directly.
 net::UploadData* URLRequest::get_upload() {
   return upload_.get();
 }
@@ skipping 424 matching lines @@
 URLRequest::UserData* URLRequest::GetUserData(const void* key) const {
   UserDataMap::const_iterator found = user_data_.find(key);
   if (found != user_data_.end())
     return found->second.get();
   return NULL;
 }
 
 void URLRequest::SetUserData(const void* key, UserData* data) {
   user_data_[key] = linked_ptr<UserData>(data);
 }